In The hallway became quiet, quiet tells us something about the hallway. In Jordan is the new manager, the new manager identifies Jordan rather than referring to a different person.
These are subject complements. They give information about the subject through a linking verb. Recognizing that relationship also helps you avoid a common mistake: assuming that anything after a verb must be an object.
What Is a Subject Complement?
A subject complement is an element that typically follows a linking verb and gives information about the subject. It may identify, classify, or describe the subject.
Olivia is the team captain.
The team captain identifies Olivia.
The water feels cold.
Cold describes the water.
A common pattern is:
Subject + Linking Verb + Subject Complement
Subject complements are closely connected with linking verbs because the verb links the subject with information about that same subject.
The complement is not the verb’s object. It belongs to a different grammatical relationship.
How a Subject Complement Relates to the Subject
The relationship with the subject is the key to understanding a subject complement.
Ava is an architect.
Ava and an architect refer to the same person. The noun phrase identifies the subject.
Now consider:
The room became silent.
Silent describes the subject the room.
In both patterns, the complement points back to the subject rather than introducing a separate participant.
Compare these two sentences:
Leo became a teacher.
Leo hired a teacher.
In the first sentence, a teacher is a subject complement. Leo became the teacher.
In the second sentence, a teacher refers to another person and functions as a direct object.
Looking at this relationship is more reliable than simply checking what appears after the verb.
The Two Traditional Types of Subject Complements
Traditional school grammar usually focuses on two main types of subject complements:
- predicate nominatives
- predicate adjectives
These categories describe two of the most common subject-complement patterns in English.
Predicate Nominative
A predicate nominative, also called a predicate noun, is a noun or noun phrase that identifies, renames, or classifies the subject.
Marcus is our new neighbor.
Our new neighbor identifies Marcus.
Their first choice was a cabin near the lake.
A cabin near the lake identifies their first choice.
A predicate nominative does not have to consist of a single noun. An entire noun phrase can perform the function.
Predicate Adjective
A predicate adjective is an adjective or adjective phrase that describes the subject after a linking verb.
The bread smells fresh.
Fresh describes the bread.
The children seemed extremely tired.
The adjective phrase extremely tired describes the children.
Predicate adjectives are an important type of subject complement.
Can Other Phrases and Clauses Be Subject Complements?
Grammar sources do not always use the term subject complement in exactly the same way.
Traditional school grammar often concentrates on predicate nouns and predicate adjectives. Broader grammatical descriptions may also treat other structures as subject complements or use the wider term predicative complement.
For example, an adverb phrase can appear in this position:
The meeting is upstairs.
A prepositional phrase can also provide information about the subject:
The keys are on the kitchen counter.
Clauses can fill a comparable complement function:
The problem is that nobody called.
Some grammar systems classify these structures differently, especially expressions of place such as upstairs or on the kitchen counter. That is why one grammar reference may give a broader list of subject complements than another.
That does not necessarily mean one grammar book is wrong. Different grammatical traditions sometimes use the same labels in different ways.
For traditional school-level grammar, predicate nouns and predicate adjectives remain the central categories. The broader terminology helps explain examples that do not fit neatly into those two traditional groups.
How to Identify a Subject Complement
Rather than relying on one question or a memorized list, look at the structure of the whole clause.
Consider:
The weather became unpleasant.
The weather is the subject. Became links it with unpleasant, which describes the weather. Unpleasant is therefore the subject complement.
Now consider:
Charlotte remained the best candidate.
The best candidate identifies the subject Charlotte, so it functions as the subject complement.
When checking a sentence, ask whether the element after the verb gives information about the subject itself. Does it identify, classify, or describe that subject through a linking relationship?
If it does, you are likely dealing with a subject complement.
Position alone is not enough. Nouns, adjectives, and other elements after verbs can perform different grammatical functions depending on the sentence.
Subject Complement vs. Direct Object
Subject complements and direct objects can both occur after verbs, but they do different jobs.
Emily became the director.
The director is a subject complement. Emily and the director refer to the same person.
Compare:
Emily called the director.
Here, the director is the direct object. Emily and the director are different participants.
The contrast also appears in these sentences:
Daniel seems confident.
Confident describes Daniel and functions as a subject complement.
Daniel understands the problem.
The problem is a direct object. It does not identify or describe Daniel.
This is why the common shortcut that an object follows an “action verb” is unreliable. A verb can take a direct object without describing an obvious physical action.
Nina knows the answer.
The answer is the direct object.
Henry owns a small apartment.
A small apartment is also a direct object.
A better way to tell the two apart is to look at the relationship in the sentence. A subject complement gives information about the subject through a linking verb, while a direct object belongs to a transitive use of a verb.
Subject Complement vs. Object Complement
A subject complement describes or identifies the subject. An object complement describes or identifies a direct object.
Compare:
The room became quiet.
Quiet describes the subject the room, so it is a subject complement.
Now consider:
They kept the room quiet.
The room is the direct object. Quiet describes that object, so it is an object complement.
A noun can show the same contrast:
Maya became president.
President identifies the subject Maya.
The committee elected Maya president.
Here, Maya is the direct object, and president identifies Maya in her role as that object. President is therefore an object complement.
The simplest way to tell them apart is to check what the complement describes or identifies: the subject or the direct object.
The Same Verb Can Have Different Functions
Some verbs act as linking verbs in one sentence but have a different function in another. This is why memorizing a list of “linking verbs” is not enough to identify subject complements.
Compare:
The soup tastes spicy.
Here, tastes links the soup with spicy. The adjective is a subject complement.
Now compare:
Mia tasted the soup.
Here, tasted is used transitively. The soup is the direct object.
The same difference appears with smell:
The flowers smell wonderful.
Wonderful describes the flowers.
Noah smelled the flowers.
The flowers is the direct object.
What matters is how the verb is being used in that sentence.
Pronouns as Subject Complements: “It Is I” or “It Is Me”?
Pronouns after forms of be show an interesting difference between traditional rules and ordinary modern usage.
Traditional prescriptive grammar often preferred subject forms:
It was I.
The winner was she.
The reasoning is that the pronoun identifies the subject rather than functioning as an object.
In everyday modern English, however, object forms are very common and fully established in this position:
It was me.
That was her.
Expressions such as It is me, That was him, and It was her are natural in ordinary English.
Subject forms such as It is I or It was she still occur, particularly in formal or deliberately traditional styles, but they can sound unusually formal in everyday conversation.
So It is I should not be taught as the only acceptable form. The choice depends partly on register and style.
Subject Complement Examples in Sentences
These examples show subject complements in several different forms and sentence patterns.
Amelia became a successful photographer.
The noun phrase a successful photographer identifies Amelia.
The pavement looks wet.
Wet describes the pavement.
Her uncle is a pilot.
A pilot identifies her uncle.
The audience grew restless.
Restless describes the audience.
Ethan remained my closest friend.
My closest friend identifies Ethan.
The coffee tastes slightly bitter.
The adjective phrase slightly bitter describes the coffee.
Their main concern was the rising cost of repairs.
The noun phrase the rising cost of repairs identifies their main concern.
The explanation seems quite reasonable.
Quite reasonable describes the explanation.
The office is downstairs.
In broader grammatical descriptions, downstairs can be analyzed as an adverb phrase functioning as a subject complement.
The important question is whether the plan will work.
In grammatical frameworks that include clauses in this complement function, whether the plan will work functions as the subject complement.
A subject complement is easiest to understand through its relationship with the subject. In the most familiar patterns, a noun or noun phrase identifies the subject, while an adjective or adjective phrase describes it. Broader grammar systems may include additional structures, but the central idea remains the same: the complement gives information about the subject through a linking relationship.
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