Definition: A sentence is a group of words that expresses a complete thought. Every sentence must have a subject (who/what) and a predicate (what the subject does or is).
✅ Complete Sentence
The dogruns fast.
✔ This is a complete sentence. It tells us who (the dog) and what it does (runs fast).
❌ Incomplete Sentence (Fragment)
Running in the park.
✘ Who is running? We don't know. This is NOT a complete sentence.
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Fun Fact
The shortest grammatically correct sentence in English is "Go!" — the subject "you" is hidden but understood.
⚠ Common Student Errors
Writing a phrase as a sentence: "Because he was tired." (incomplete thought)
Forgetting a full stop at the end of a sentence.
Starting a sentence with a lowercase letter.
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2. Subject and Predicate
Subject
Definition: The subject is the part of the sentence that tells us who or what the sentence is about. It is usually a noun or pronoun.
Predicate
Definition: The predicate is the part that tells us what the subject does, is, or has. It always contains a verb.
Subject (Who/What)
Predicate (What about it?)
Sara
loves reading books.
The birds
sing sweetly every morning.
My little brother
is very clever.
The old car
broke down on the road.
They
played football after school.
Simple Subject vs Complete Subject
Example
The tall girl with red shoeswon the race.
Complete Subject:The tall girl with red shoes Simple Subject (key noun):girl
Simple Predicate vs Complete Predicate
Example
The babyslept quietly in her crib all night.
Complete Predicate:slept quietly in her crib all night Simple Predicate (main verb):slept
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Think About It
Ask "Who or what is the sentence about?" → that's the subject. Ask "What does the subject do or what is said about it?" → that's the predicate!
⚠ Common Student Errors
Confusing a long describing phrase as the subject: the simple subject is always the main noun.
Thinking only one word can be a subject — groups of words can be a subject too.
Missing the verb in the predicate (e.g., writing "The cat on the mat." — no verb!).
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3. Parts of the Predicate
Definition: The predicate can contain several parts: the verb, an object, a complement, and various phrases (like time, place, manner).
Full Predicate Breakdown
Mariagaveher frienda giftat the party.
Verb: gave |
Indirect Object: her friend |
Direct Object: a gift |
Adverbial Phrase: at the party
Predicate Part
Question It Answers
Example
Verb
What does the subject do/be?
ran
Direct Object
What / Whom?
the ball
Indirect Object
To whom / For whom?
her sister
Subject Complement
What/Who is the subject?
happy
Adverbial Phrase
Where / When / How / Why?
in the garden
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Fun Fact
A predicate with only a verb (like "She laughed.") is perfectly correct. Not all predicates need an object!
⚠ Common Student Errors
Thinking the predicate must always be long — "ran" alone can be a complete predicate.
Placing the object before the verb: wrong order causes confusion.
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4. The Verb
Definition: A verb is a word that shows an action, a state, or an occurrence. Every sentence must have at least one verb. It is the engine of the sentence!
Type
What it shows
Examples
Action Verb
Physical or mental action
run, eat, think, jump, write
Linking Verb
Connects subject to description
is, are, was, were, seem, become
Helping Verb
Helps the main verb
have, has, will, can, must, should
Action Verb
Alikicked the ball hard.
"kicked" is the action verb — it tells what Ali did.
Helping Verb
Shehas been studying for two hours.
"has been" are helping verbs; "studying" is the main verb.
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Fun Fact
The word "set" has the most meanings of any English verb — over 430 definitions in the Oxford English Dictionary!
⚠ Common Student Errors
Forgetting that "is", "are", "was" are also verbs (linking verbs, not action verbs).
Treating a gerund (verb+ing as a noun) as the main verb: "Swimming is fun." — "swimming" is the subject here, not the main verb.
Subject-verb agreement errors: "The children runs" should be "The children run".
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5. Intransitive Verbs
Definition: An intransitive verb is an action verb that does not need an object to complete its meaning. The action stays with the subject.
Key Test: Ask "What?" or "Whom?" after the verb — if there is no answer, the verb is intransitive.
Examples
The babycried.
Cried what? — No answer. ✔ Intransitive.
More Examples
The birdsflew high in the sky.
Flew what? — No object. ✔ Intransitive. ("High in the sky" is an adverbial phrase, not an object.)
Sentence
Verb
Object?
Type
He laughed loudly.
laughed
None
Intransitive
The sun shines.
shines
None
Intransitive
She arrived early.
arrived
None
Intransitive
The dog barked.
barked
None
Intransitive
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Think About It
Some verbs can be both transitive and intransitive depending on how they're used:
"She reads every day." (intransitive) vs. "She reads a book." (transitive)
⚠ Common Student Errors
Confusing an adverb or adverbial phrase as an object: "She ran quickly" — "quickly" is NOT an object.
Thinking all verbs need an object — intransitive verbs are complete without one.
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6. Transitive Verbs
Definition: A transitive verb is an action verb that transfers action to an object. The action moves from the subject → verb → object. Without an object, the sentence feels incomplete.
Key Test: Ask "What?" or "Whom?" after the verb — if you get an answer, the verb is transitive.
Examples
Tomatea mango.
Ate what? → a mango. ✔ Transitive. "a mango" is the direct object.
More Examples
Shewrotea letter to her friend.
Wrote what? → a letter. ✔ Transitive. "to her friend" is an adverbial phrase.
Sentence
Verb
Object
Type
He broke the window.
broke
the window
Transitive
She bought new shoes.
bought
new shoes
Transitive
They painted the wall.
painted
the wall
Transitive
I love chocolate.
love
chocolate
Transitive
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Fun Fact
The word "transitive" comes from Latin transire meaning "to go across" — the action goes across from the doer to the receiver!
⚠ Common Student Errors
Using a transitive verb without an object: "She bought." — bought what? The sentence is incomplete.
Adding an unnecessary object to an intransitive verb: "She arrived the station." — incorrect; "arrived" is intransitive.
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7. Linking Verbs
Definition: A linking verb connects the subject to a word that describes or renames it. It does not show action — it shows a state of being. The most common linking verbs are forms of to be: is, am, are, was, were.
Definition: An object is a word (or group of words) in the predicate that receives the action of a transitive verb or is affected by it. There are two types: direct object and indirect object.
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9. Direct and Indirect Objects
Direct Object
Definition: The direct object is the noun or pronoun that directly receives the action of the verb. Find it by asking: Verb + "What?" or "Whom?"
Examples of Direct Object
Shekickedthe ball.
Kicked what? → the ball. ✔ "the ball" is the direct object.
Example 2
Hecalledhis mother.
Called whom? → his mother. ✔ "his mother" is the direct object.
Indirect Object
Definition: The indirect object is the noun or pronoun that tells us to whom or for whom the action of the verb is done. It comes before the direct object. Find it by asking: Verb + Direct Object + "To whom?" or "For whom?"
Example with Both Objects
Fatherboughtmea bicycle.
Bought what? → a bicycle (Direct Object)
Bought for whom? → me (Indirect Object)
Example 2
The teachergavethe studentsa test.
Gave what? → a test (Direct Object)
Gave to whom? → the students (Indirect Object)
Sentence
Indirect Object
Direct Object
She sent him a message.
him
a message
We told the class a story.
the class
a story
He showed his sister the photo.
his sister
the photo
Mom made us dinner.
us
dinner
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Fun Fact
You can rewrite a sentence with an indirect object using "to" or "for":
"She gave him a book." = "She gave a book to him."
⚠ Common Student Errors
Mixing up direct and indirect objects — remember: IO comes before DO.
Thinking every sentence with a transitive verb has an indirect object — not always true.
Identifying a prepositional phrase as an indirect object: "She gave a book to him" — here "him" is in a prepositional phrase, not an indirect object.
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10. Subject Complement & Object Complement
Subject Complement
Definition: A subject complement follows a linking verb and describes or renames the subject. It is either a predicate adjective (adjective) or a predicate nominative (noun/pronoun).
Predicate Adjective (describes the subject)
The skyisblue.
"blue" is an adjective describing the subject "sky." ✔ Subject complement (predicate adjective).
Predicate Nominative (renames the subject)
Hebecamethe class captain.
"the class captain" is a noun phrase that renames "he." ✔ Subject complement (predicate nominative).
Object Complement
Definition: An object complement follows the direct object and describes or renames the direct object. It is also either an adjective or a noun.
Object Complement — Adjective
Theypaintedthe doorred.
"red" describes the direct object "the door." ✔ Object complement.
Object Complement — Noun
WeelectedSarapresident.
"president" renames the direct object "Sara." ✔ Object complement.
Type
Follows
Example
Subject Complement
Linking verb
She iskind.
Object Complement
Direct object
They called hima genius.
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Memory Tip
Subject Complement = after linking verb → describes/renames the subject. Object Complement = after direct object → describes/renames the object.
⚠ Common Student Errors
Confusing a predicate adjective with an adverb: "She is beautiful" (adjective, subject complement) ≠ "She sings beautifully" (adverb).
Confusing object complement with indirect object — they serve very different roles.
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11. Adjective Phrase
Definition: An adjective phrase is a group of words that acts like an adjective — it describes a noun or pronoun. It usually follows the noun it describes.
Examples
The girl with long hair is my sister.
"with long hair" describes the noun "girl." ✔ Adjective phrase.
Example 2
The book on the top shelf belongs to me.
"on the top shelf" describes the noun "book." ✔ Adjective phrase.
Sentence
Adjective Phrase
Noun It Describes
The boy in the red shirt won.
in the red shirt
boy
The house near the lake is old.
near the lake
house
A man of great courage stood up.
of great courage
man
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Fun Fact
Adjective phrases usually begin with a preposition (in, on, of, with, near...) and work just like a single adjective!
⚠ Common Student Errors
Placing an adjective phrase too far from the noun it describes, causing confusion: "The dog barked at the man with sharp teeth." — whose sharp teeth? Place phrases close to the noun they modify.
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12. Adverbial Phrase
Definition: An adverbial phrase is a group of words that acts like an adverb — it tells us when, where, how, why, or how much something happens. It modifies a verb, adjective, or another adverb.
Answers
Example Phrase
Example Sentence
Where?
in the park
They played in the park.
When?
after school
She arrived after school.
How?
with great care
He lifted the box with great care.
Why?
because of the rain
They stayed home because of the rain.
How long?
for two hours
She slept for two hours.
Full Example
The childrenplayedin the gardenuntil sunset.
"in the garden" → adverbial phrase (where)
"until sunset" → adverbial phrase (when)
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Memory Tip
Adverbial phrases answer the same questions as adverbs: When? Where? How? Why? How often? How long?
⚠ Common Student Errors
Confusing adverbial phrases with adjective phrases — ask: does it describe a noun? (adjective phrase) or modify a verb/adjective? (adverbial phrase).
Using double adverbials that contradict: "She walked quickly with slow steps." — be consistent.
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13. Prepositional Phrase
Definition: A prepositional phrase begins with a preposition (in, on, at, by, with, of, under, beside, between...) and ends with a noun or pronoun (called the object of the preposition). It can act as either an adjective phrase or an adverbial phrase.
Examples
The cat sat under the table.
"under" = preposition; "the table" = object. Modifies the verb "sat" (where). ✔ Adverbial prepositional phrase.
Example 2
The key on the desk is mine.
"on the desk" modifies the noun "key" (which key?). ✔ Adjective prepositional phrase.
Common Prepositions
in, on, at, by, with, of, for, to, from, under, over, beside, between, through, about, behind, during, after, before, near, across
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Fun Fact
A preposition always has a team — it never works alone. Preposition + noun/pronoun = prepositional phrase!
⚠ Common Student Errors
Ending a formal sentence with a preposition: "Where is she from?" is acceptable in everyday speech but in formal writing, restructure carefully.
Using wrong preposition: "He is good in maths" — should be "good at maths."
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14. Appositive Phrase
Definition: An appositive phrase is a noun or noun phrase placed next to another noun to identify or give more information about it. It is usually set off by commas.
Examples
Mr. Ahmed,our English teacher, won an award.
"our English teacher" identifies/explains "Mr. Ahmed." ✔ Appositive phrase.
Example 2
My dog, a golden retriever, loves to swim.
"a golden retriever" renames "my dog." ✔ Appositive phrase.
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Memory Tip
Try removing the appositive phrase — if the sentence still makes sense, it's a non-essential appositive (use commas). If the sentence loses its meaning, it's essential (no commas).
⚠ Common Student Errors
Forgetting commas around non-essential appositives: "My sister Sara likes cats." (Sara = essential) vs. "My sister, Sara, likes cats." (Sara = non-essential, only one sister).
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Quick Reference: Sentence Structure Summary
Term
What It Is
Question It Answers
Example
Subject
Who/what the sentence is about
Who? What?
Birds sing.
Predicate
What the subject does/is
What does/is?
Birds sing loudly.
Transitive Verb
Action that needs an object
—
She ate rice.
Intransitive Verb
Action needing no object
—
He laughed.
Linking Verb
Connects subject to description
—
She is tall.
Direct Object
Receives the verb's action
What? Whom?
He kicked the ball.
Indirect Object
Benefits from the action
To/for whom?
She gave him a pen.
Subject Complement
Describes/renames subject (after linking verb)
—
He is smart.
Object Complement
Describes/renames direct object
—
They called him captain.
Adjective Phrase
Describes a noun
Which? What kind?
The girl with curly hair.
Adverbial Phrase
Modifies a verb/adj/adverb
When? Where? How?
He ran in the rain.
Prepositional Phrase
Begins with a preposition
Varies
She sat on the chair.
Appositive Phrase
Renames a nearby noun
—
Ali, my best friend, came.
🎯 Test Your Knowledge!
You've learned all about sentence structure! Now try the quiz and see how much you remember. Good luck, superstar! ⭐