Basic Sentence Patterns

English simple sentences follow a small number of recurring patterns. Once you learn these patterns, you can construct an enormous variety of sentences by plugging different words into each slot. This section presents the five fundamental sentence patterns with extensive examples so you can see how each one works.

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Why Patterns Matter

Think of sentence patterns as blueprints. Just as a builder uses blueprints to construct different buildings, a writer uses sentence patterns to construct different sentences. The words change, but the underlying structure stays the same.

Knowing these patterns helps you in two ways:

1. When writing: You can generate correct sentences more quickly because you know where each element goes.
2. When editing: You can diagnose problems by checking whether your sentence follows a valid pattern.

There are five basic patterns in English. Every simple sentence fits one of them.

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Pattern 1: Subject + Verb (SV)

This is the simplest possible sentence. It contains only a subject and an intransitive verb. No object is needed because the verb's meaning is complete on its own.

Structure: Subject + Verb

Examples

Subject	Verb
Birds	sing.
The baby	cried.
It	rained.
Accidents	happen.
The sun	rises.
She	smiled.
Everyone	laughed.
Time	flies.
The phone	rang.
The meeting	ended.

With Modifiers

SV sentences often include adverbs, adverb phrases, or prepositional phrases that add detail. These modifiers are optional -- the sentence is grammatically complete without them.

The baby cried loudly.

Birds sing in the morning.

She smiled at the stranger.

The phone rang three times.

The meeting ended abruptly at 4 PM.

Everyone laughed nervously during the presentation.

Even with the modifiers, these remain SV sentences because the verbs are intransitive and take no direct object.

Common Mistakes with SV Sentences

Adding an unnecessary object:

The accident happened it suddenly. --> The accident happened suddenly.

Intransitive verbs do not take objects. "Happen" cannot have "it" as an object.

Forgetting the subject:

Rained all day. --> It rained all day.

In English, almost every sentence needs an explicit subject. Weather verbs use "it" as a dummy subject.

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Pattern 2: Subject + Verb + Object (SVO)

This is the most common sentence pattern in English. The verb is transitive and requires an object to complete its meaning.

Structure: Subject + Verb + Object

Examples

Subject	Verb	Object
She	reads	novels.
The company	hired	ten employees.
I	forgot	my password.
They	built	a new bridge.
The teacher	explained	the concept.
We	ordered	pizza.
He	answered	all the questions.
The storm	destroyed	several homes.
My sister	plays	the violin.
The committee	approved	the proposal.

With Modifiers

She carefully reads long historical novels before bed.

The company recently hired ten new employees for the marketing department.

The powerful storm completely destroyed several coastal homes last night.

Notice that modifiers (adjectives before nouns, adverbs near verbs, prepositional phrases at the end) add detail but do not change the core SVO pattern.

Recognizing the Object

To confirm a word is the direct object, ask: "[Subject] [verb] what?" or "[Subject] [verb] whom?"

She reads what? --> novels (direct object)

He answered what? --> all the questions (direct object)

The company hired whom? --> ten employees (direct object)

If the question does not make sense with "what" or "whom," the verb might be intransitive, and you may be looking at a different pattern.

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Pattern 3: Subject + Verb + Complement (SVC)

In this pattern, the verb is a linking verb, and instead of an object, it is followed by a subject complement -- a word or phrase that describes or identifies the subject.

Structure: Subject + Linking Verb + Complement

The complement can be:

• A predicate adjective (describes the subject)
• A predicate noun/pronoun (identifies or renames the subject)

The Most Common Linking Verb: Be

Forms of "be" (am, is, are, was, were, been, being) are the most frequently used linking verbs.

Subject	Linking Verb	Complement	Type
She	is	a doctor.	predicate noun
The weather	is	cold.	predicate adjective
They	are	students.	predicate noun
I	am	ready.	predicate adjective
The test	was	difficult.	predicate adjective
The winners	were	Maria and John.	predicate noun

Other Linking Verbs

Several other verbs function as linking verbs. They connect the subject to a description rather than showing action.

Subject	Linking Verb	Complement
The food	tastes	delicious.
She	seems	happy.
The milk	smells	sour.
He	became	a teacher.
The sky	looks	clear.
The fabric	feels	soft.
She	appeared	nervous.
The leaves	turned	brown.
He	remained	calm.
The soup	grew	cold.

How to Tell a Linking Verb from an Action Verb

Some verbs can be either linking or action depending on usage. Use the substitution test: replace the verb with a form of "be" (is, am, are, was, were). If the sentence still makes sense, the verb is linking.

The soup tastes delicious. --> The soup is delicious. (Makes sense --> linking verb.)

She tasted the soup. --> She is the soup. (Does not make sense --> action verb.)

He looked tired. --> He was tired. (Makes sense --> linking verb.)

He looked at the painting. --> He was at the painting. (Does not work the same way --> action verb.)

Common Mistakes with SVC

Using an adverb instead of an adjective after a linking verb:

She feels badly about the mistake. --> She feels bad about the mistake.

The food smells wonderfully. --> The food smells wonderful.

After a linking verb, use an adjective (which describes the subject), not an adverb.

Confusing SVC with SVO:

In SVO, the object is a different thing from the subject. In SVC, the complement describes or equals the subject.

She met a doctor. (SVO -- "a doctor" is a different person from "she.")

She is a doctor. (SVC -- "a doctor" identifies who "she" is.)

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Pattern 4: Subject + Verb + Indirect Object + Direct Object (SVOO)

Some transitive verbs can take two objects: an indirect object (the receiver or beneficiary) and a direct object (the thing given, told, shown, etc.).

Structure: Subject + Verb + Indirect Object + Direct Object

Examples

Subject	Verb	Indirect Object	Direct Object
She	gave	her friend	a gift.
The teacher	told	the students	a story.
I	sent	my boss	an email.
He	showed	us	his new car.
The company	offered	her	a promotion.
Mom	made	the children	breakfast.
She	taught	me	English.
They	bought	their daughter	a bicycle.
He	asked	the waiter	a question.
The guide	showed	the tourists	the ancient ruins.

Finding the Two Objects

To identify the objects, ask two questions:

1. Direct object: [Subject] [verb] what? --> She gave what? A gift.
2. Indirect object: [Subject] [verb] [direct object] to/for whom? --> She gave a gift to whom? Her friend.

The indirect object always comes before the direct object in this pattern.

The Alternative: Prepositional Phrase

The same meaning can be expressed by moving the indirect object after the direct object and adding a preposition (to or for).

SVOO Pattern	Alternative with Preposition
She gave her friend a gift.	She gave a gift to her friend.
I sent my boss an email.	I sent an email to my boss.
Mom made the children breakfast.	Mom made breakfast for the children.
He bought his daughter a bicycle.	He bought a bicycle for his daughter.

Both versions are correct. The SVOO pattern is more common in everyday speech and writing. The prepositional version is useful when you want to emphasize the receiver.

Common Verbs That Take Two Objects

With "to": give, send, show, tell, teach, offer, lend, write, read, pass, hand, pay, owe, promise.

With "for": buy, make, cook, build, find, get, save, order, prepare.

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Pattern 5: Subject + Verb + Object + Complement (SVOC)

In this pattern, the complement describes or renames the object (not the subject). It tells us something about the object after the action.

Structure: Subject + Verb + Object + Object Complement

Examples

Subject	Verb	Object	Object Complement
They	elected	her	president.
The news	made	everyone	happy.
She	painted	the wall	blue.
We	consider	him	a genius.
The cold weather	kept	us	indoors.
They	named	the baby	Oliver.
The jury	found	the defendant	guilty.
The coach	called	the play	brilliant.
Heat	turns	water	into steam.
The board	appointed	Ms. Chen	director.

How the Object Complement Works

The object complement gives additional information about the object. Without it, the sentence would be incomplete or have a different meaning.

They elected her. (Elected her to what? The sentence feels unfinished.)

They elected her president. (Now it is complete.)

The news made everyone. (Made everyone what? Incomplete.)

The news made everyone happy. (Complete.)

Distinguishing SVOO from SVOC

This is a common source of confusion. Here is the key test:

• In SVOO, the two elements after the verb refer to two different things.
• In SVOC, the complement describes or equals the object.

She gave the boy a book. (SVOO -- the boy and the book are different things.)

They called the boy a genius. (SVOC -- "a genius" describes "the boy.")

Another test: In SVOC, you can insert "to be" between the object and complement, and the sentence still makes sense.

They consider him (to be) a genius. (Makes sense --> SVOC.)

She gave the boy (to be) a book. (Does not make sense --> SVOO.)

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All Five Patterns at a Glance

Pattern	Structure	Example
SV	Subject + Verb	The baby slept.
SVO	Subject + Verb + Object	She reads novels.
SVC	Subject + Linking Verb + Complement	The food tastes delicious.
SVOO	Subject + Verb + Indirect Object + Direct Object	He gave her a ring.
SVOC	Subject + Verb + Object + Object Complement	They elected her president.

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Expanding Simple Sentences

You can make any of these patterns longer and more interesting without changing the core structure. Use:

• Adjectives to describe nouns: The experienced, dedicated teacher explained the complex concept.
• Adverbs to describe verbs: She carefully reads every sentence.
• Prepositional phrases to add detail: The cat slept on the windowsill throughout the afternoon.
• Appositives to rename a noun: Dr. Lee, our family dentist, is very gentle.
• Compound subjects: Tom and Maria finished the project.
• Compound verbs: She read the article and wrote a summary.
• Compound objects: He bought a shirt, a tie, and a belt.

All of these remain simple sentences as long as there is only one independent clause.

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Practice: Identify the Pattern

Label each sentence with its pattern (SV, SVO, SVC, SVOO, or SVOC). Answers are below.

1. The children laughed.
2. She became a lawyer.
3. I sent him a message.
4. The committee appointed her chairperson.
5. We enjoyed the concert.
6. The flowers bloomed in the garden.
7. The cake smells wonderful.
8. She taught us grammar.
9. They painted the fence white.
10. The dog barked loudly.

Answers:

1. SV -- "laughed" is intransitive; no object.
2. SVC -- "became" is a linking verb; "a lawyer" identifies the subject.
3. SVOO -- "him" is the indirect object; "a message" is the direct object.
4. SVOC -- "her" is the object; "chairperson" is the object complement.
5. SVO -- "the concert" is the direct object.
6. SV -- "bloomed" is intransitive; "in the garden" is a prepositional phrase, not an object.
7. SVC -- "smells" is a linking verb; "wonderful" describes the subject.
8. SVOO -- "us" is the indirect object; "grammar" is the direct object.
9. SVOC -- "the fence" is the object; "white" describes the object.
10. SV -- "barked" is intransitive; "loudly" is an adverb, not an object.

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Quick Summary

Pattern	What Follows the Verb	Key Signal
SV	Nothing (or just modifiers)	Intransitive verb
SVO	A direct object	Transitive verb; object is a different thing from subject
SVC	A complement (adjective or noun)	Linking verb; complement describes/equals the subject
SVOO	An indirect object + a direct object	Two different things after the verb; can rephrase with "to/for"
SVOC	An object + a complement	Complement describes/equals the object; can insert "to be"

Avoiding Sentence Fragments

A sentence fragment is a group of words that looks like a sentence -- it starts with a capital letter and ends with a period -- but it is not a complete sentence. Fragments are one of the most common errors in student writing, and they can make your writing unclear or difficult to follow.

This section explains what fragments are, why they happen, and how to fix them.

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What Makes a Complete Sentence?

Before you can spot a fragment, you need to know the requirements for a complete sentence. A complete sentence must meet all three of these conditions:

1. It has a subject. (Who or what the sentence is about.)
2. It has a verb. (What the subject does or is.)
3. It expresses a complete thought. (It can stand alone and make sense.)

If any one of these is missing, the group of words is a fragment.

Complete Sentence	Fragment	What's Missing?
The students studied for the exam.	Studied for the exam.	Subject
She is very talented.	Very talented.	Subject and verb
Because she was tired, she went to bed.	Because she was tired.	Complete thought
The report that was submitted yesterday.	The report that was submitted yesterday.	Main verb (for "report")
Running through the park at sunrise.	Running through the park at sunrise.	Subject and main verb

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The Five Most Common Types of Fragments

Type 1: Missing Subject

The fragment has a verb but no subject. This often happens when a writer splits a compound predicate into two sentences.

Fragment:

She finished her homework. And then went to bed.

"And then went to bed" has no subject. Who went to bed?

How to Fix:

Option A -- Combine the sentences:

She finished her homework and then went to bed.

Option B -- Add a subject:

She finished her homework. She then went to bed.

More Examples:

Fragment	Fix
He opened the door. Walked inside.	He opened the door and walked inside.
The team practiced hard. Won the championship.	The team practiced hard and won the championship.
She read the article. Found it very interesting.	She read the article and found it very interesting.

Type 2: Missing Verb

The fragment has a subject but no proper verb. This often happens with noun phrases that the writer mistakes for complete sentences.

Fragment:

The tall building on the corner of Main Street.

This names something (the building) but does not say anything about it. There is no verb.

How to Fix:

Option A -- Add a verb:

The tall building on the corner of Main Street is being renovated.

Option B -- Attach it to a neighboring sentence:

We could see the tall building on the corner of Main Street from our window.

More Examples:

Fragment	Fix
A brilliant idea for the project.	She had a brilliant idea for the project.
The best restaurant in the city.	It is the best restaurant in the city.
My neighbor, a retired engineer.	My neighbor, a retired engineer, fixed the gate.

Type 3: Dependent Clause Standing Alone

This is the most common type of fragment. A dependent clause starts with a subordinating word (because, although, when, if, since, while, that, which, who, etc.) and cannot stand alone.

Fragment:

Because the weather was bad.

This has a subject ("the weather") and a verb ("was"), but the word "because" makes the reader expect more information. What happened because the weather was bad? The thought is incomplete.

How to Fix:

Option A -- Attach it to a main clause:

Because the weather was bad, we canceled the picnic.

Option B -- Remove the subordinating word:

The weather was bad. (Now it is an independent clause.)

Common Subordinating Words That Create Dependent Clauses:

Category	Words
Cause/reason	because, since, as
Contrast	although, though, even though, whereas, while
Time	when, whenever, while, after, before, until, since, as soon as
Condition	if, unless, provided that, as long as
Purpose	so that, in order that
Relative	who, whom, whose, which, that, where

More Examples:

Fragment	Fix
When the alarm went off.	When the alarm went off, everyone evacuated.
Although he studied hard.	Although he studied hard, he did not pass the exam.
Which was published last year.	She read the book, which was published last year.
If you have any questions.	If you have any questions, please ask the instructor.
Since the company was founded in 2010.	Since the company was founded in 2010, it has grown rapidly.

Type 4: -ing Phrase (Participial Phrase) Standing Alone

Phrases beginning with a present participle (-ing word) are not complete sentences on their own because the -ing form is not a complete verb without a helping verb.

Fragment:

Running through the park every morning.

Who is running? There is no subject, and "running" alone is not a complete verb.

How to Fix:

Option A -- Add a subject and helping verb:

She is running through the park every morning.

Option B -- Attach it to a main clause:

Running through the park every morning, she stays in excellent shape.

Option C -- Change the -ing form to a complete verb:

She runs through the park every morning.

More Examples:

Fragment	Fix
Waiting for the bus in the rain.	We were waiting for the bus in the rain.
Hoping to get a good grade on the exam.	Hoping to get a good grade, he studied all night.
Working overtime every day last week.	She was working overtime every day last week.
Trying to finish the report before the deadline.	Trying to finish the report, she skipped lunch.

Important Note: An -ing word can be a verb when paired with a helping verb: "She is running," "They were waiting," "He has been working." It is only a fragment when the -ing word appears without a helping verb and without a main clause.

Type 5: Infinitive Phrase Standing Alone

Phrases beginning with "to + verb" (infinitives) are not complete sentences.

Fragment:

To improve her writing skills.

This tells us a purpose or goal but does not say who is doing it or what action is being taken.

How to Fix:

Option A -- Attach it to a main clause:

To improve her writing skills, she practices every day.

Option B -- Make it the subject of a sentence:

To improve her writing skills requires daily practice.

More Examples:

Fragment	Fix
To complete the assignment on time.	To complete the assignment on time, they worked through the weekend.
To become a successful entrepreneur.	To become a successful entrepreneur, you need determination.
To understand the problem better.	To understand the problem better, the team reviewed the data.

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Why Fragments Happen

Understanding the causes helps you avoid them.

1. Afterthought Fragments

You write a complete sentence, then add a thought that should be part of it -- but you put a period instead of a comma.

She works at a hospital. As a nurse. --> She works at a hospital as a nurse.

2. List or Example Fragments

You list items or give examples after a sentence but format them as a separate sentence.

He enjoys several hobbies. Such as painting, reading, and hiking. --> He enjoys several hobbies, such as painting, reading, and hiking.

The store sells many things. For example, books, toys, and clothing. --> The store sells many things -- for example, books, toys, and clothing.

3. Explanation Fragments

You add an explanation using "especially," "particularly," "including," or "except" as if it were a new sentence.

She loves all fruits. Especially strawberries. --> She loves all fruits, especially strawberries.

4. Relative Clause Split-Off

A relative clause (starting with who, which, that) is separated from the noun it describes.

The professor assigned a book. Which was published in 1985. --> The professor assigned a book that was published in 1985.

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How to Find Fragments in Your Writing

Use this step-by-step method to check every sentence in your writing.

Step 1: Find the Verb

Read the sentence and locate the main verb. Remember:

• An -ing word alone is not a main verb (needs a helping verb).
• An infinitive (to + verb) is not a main verb.
• A past participle alone (e.g., "written," "broken") is not a main verb (needs a helping verb).

If you cannot find a main verb, you have a fragment.

Step 2: Find the Subject

Ask: "Who or what [verb]?" If you cannot identify a subject, you have a fragment.

Step 3: Check for Completeness

Even if you found both a subject and a verb, check whether the sentence begins with a subordinating word (because, although, when, if, who, which, etc.). If it does and there is no main clause to complete the thought, you have a fragment.

The Three-Question Test

For every sentence you write, ask:

1. Does it have a subject? (Who or what is the sentence about?)
2. Does it have a complete verb? (Not just an -ing word or infinitive.)
3. Does it express a complete thought? (Can it stand alone without leaving the reader asking "What about it?" or "What happened?")

If the answer to any of these is "no," you have a fragment and need to fix it.

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Fragment Fix Strategies: A Quick Reference

Fragment Type	How to Fix
Missing subject	Add a subject OR attach to previous sentence
Missing verb	Add a verb OR attach to a neighboring sentence
Dependent clause alone	Attach to a main clause OR remove the subordinating word
-ing phrase alone	Add subject + helping verb, OR attach to a main clause, OR change to a full verb
Infinitive phrase alone	Attach to a main clause OR make it the subject of a new sentence
Afterthought/example/list	Attach to previous sentence with a comma, dash, or colon

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When Fragments Are Acceptable

In formal and academic writing, fragments should be avoided entirely. However, you may encounter intentional fragments in certain contexts:

• Creative writing and fiction: "She looked out the window. Nothing. Not a single car on the street." (The fragments create a dramatic effect.)
• Advertising: "Built to last. Designed for you." (Punchy and memorable.)
• Conversational dialogue: "Where?" "Over there." "When?" "Tomorrow." (Mimics real speech.)
• Answering questions: "What is your favorite color?" "Blue." (Fragments are natural in Q&A.)

For the purposes of your writing exams, essays, and professional communication, treat fragments as errors and eliminate them. Once you have mastered complete sentences, you can choose to use fragments for stylistic effect when appropriate -- but that requires understanding the rules first.

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Complete Sentence Checklist

Use this checklist every time you proofread your writing. Go through each sentence one by one.

For each sentence, verify:

• Subject is present. I can identify who or what the sentence is about.
• Main verb is present. The sentence contains a finite verb (not just an -ing form or infinitive without a helper).
• The thought is complete. The sentence does not start with a subordinating word (because, although, when, if, which, who) without connecting to a main clause.
• No split compound predicates. If I used "and" + a verb in a separate sentence, I either added a subject or combined it with the previous sentence.
• Afterthoughts are attached. Phrases starting with "such as," "especially," "for example," "including," or "except" are joined to the main sentence.
• Relative clauses are connected. Clauses starting with "who," "which," or "that" are attached to the noun they describe.

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Practice: Fragment or Complete Sentence?

Label each item as a complete sentence (C) or a fragment (F). If it is a fragment, explain what is missing. Answers are below.

1. The report was submitted on time.
2. Running along the beach at sunset.
3. Because the store was closed.
4. She is an excellent writer.
5. The manager who hired us last year.
6. To finish the project before Friday.
7. Although expensive, the course was worth it.
8. Birds sing.
9. Such as chemistry, physics, and biology.
10. Working late every night, he finished the book.

Answers:

1. C -- Has a subject ("the report"), a verb ("was submitted"), and expresses a complete thought.
2. F -- Missing a subject and a main verb. "Running" is a participle, not a complete verb. Fix: "She was running along the beach at sunset."
3. F -- Dependent clause. "Because" makes the thought incomplete -- what happened because the store was closed? Fix: "Because the store was closed, we went home."
4. C -- Has a subject ("she"), a linking verb ("is"), and a complement ("an excellent writer").
5. F -- Missing a main verb for "the manager." "Who hired us last year" is a relative clause modifying "manager," but the sentence never says what the manager did. Fix: "The manager who hired us last year retired."
6. F -- Infinitive phrase with no subject or main clause. Fix: "To finish the project before Friday, the team worked overtime."
7. C -- This is a complete sentence. "Although expensive" is an elliptical clause (short for "although it was expensive"), and "the course was worth it" is the main clause. Together, they form a complete thought.
8. C -- Subject ("birds") + intransitive verb ("sing"). The simplest possible complete sentence.
9. F -- A list introduced by "such as" with no main clause. Fix: Attach to a previous sentence: "She studies several sciences, such as chemistry, physics, and biology."
10. C -- "He finished the book" is the main clause. "Working late every night" is a participial phrase modifying "he." The sentence has a subject, a verb, and a complete thought.

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Quick Summary

Concept	Key Point
Complete sentence requires	Subject + verb + complete thought
Fragment	Missing one or more of the three requirements
Most common fragment	Dependent clause standing alone (because, although, when...)
-ing words	Not complete verbs without a helper (is, was, were, has been...)
Fix strategies	Add the missing element OR attach to a neighboring sentence
Afterthoughts	Join to main sentence with comma, dash, or colon
Formal writing	Always avoid fragments
Proofreading	Use the three-question test on every sentence