What are Subjects in English Sentences?
Every complete sentence in English must have a subject. The subject answers the question 'Who or what does the verb describe?' It is usually a noun, a pronoun, or a noun phrase, and it almost always comes before the verb in declarative sentences.
The subject controls the verb. When you know the subject, you know whether the verb should be singular or plural, and whether to use 'is', 'are', 'was', or 'were'. Every agreement decision flows from identifying the subject correctly.
Subjects can be more than just single nouns. A gerund (-ing form), an infinitive phrase, or a whole noun clause can fill the subject slot — knowing these forms is essential at B1 level and above.
Where the Subject Sits
In standard English word order, the subject comes before the verb. To find it, ask 'Who or what + verb?' For example: 'The manager signed the contract' → Who signed? The manager — that is the subject.
Subject + Verb (+ Object)Basic Sentence Patterns
| Subject | Verb | Rest of sentence |
|---|---|---|
| The student | passed | the exam with distinction. |
| They | have been waiting | for two hours. |
| Running every day | requires | real commitment. |
| What she said | surprised | everyone in the room. |
Finding the Subject — Quick Method
Ask 'Who or what + verb?' The answer is the subject.
| Sentence | Question to ask | Subject |
|---|---|---|
| The old bridge collapsed. | What collapsed? | The old bridge |
| She has never been late. | Who has never been late? | She |
| Eating well matters. | What matters? | Eating well |
Types of Subjects
Noun or noun phrase as subject
The most common subject type. A single noun, or a noun expanded by articles, adjectives, or modifiers, fills the subject slot. The verb agrees with the head noun of the phrase — the main noun around which the phrase is built.
- The senior project manager will present the findings.
- Heavy rain delayed the flight by three hours.
- A small group of volunteers cleaned the river bank.
Pronoun as subject
Personal pronouns replace a noun as subject. The subject form (nominative case) must be used — never the object form. This matters most in formal writing and in compound subjects.
- She submitted the proposal early.
- They have redesigned the entire system.
- He and I will handle the presentation. (not 'me')
Gerund (verb + -ing) as subject
A gerund — the -ing form used as a noun — can be the subject of a sentence. A gerund subject is always treated as singular, no matter how long or complex the gerund phrase.
- Cycling to work saves money and reduces stress.
- Learning a second language becomes easier with daily practice.
- Making assumptions without evidence leads to poor decisions.
Infinitive phrase as subject
A to-infinitive phrase can fill the subject slot, though this construction is more common in formal or written English. Like gerund subjects, infinitive subjects are singular. In everyday speech, the 'it + is + adjective + to-infinitive' structure is more natural.
- To understand the rule is one thing; to apply it correctly is another.
- To leave without saying goodbye seemed rude.
Dummy subjects: 'there' and 'it'
English sometimes uses 'there' or 'it' as a placeholder subject when the real subject comes later. The verb still agrees with the real subject, not with 'there'.
- There is a problem with the data. (real subject: 'a problem')
- There are several options available. (real subject: 'several options')
- It is impossible to verify the claim.
Noun clause as subject
A whole clause beginning with 'what', 'that', 'whether', or a wh-word can function as the subject. Noun clause subjects are always treated as singular.
- What the report revealed shocked the entire team.
- Whether she will accept is still uncertain.
- That mistakes were made is now beyond dispute.
How to Identify the Subject
Subject Pronouns vs Object Pronouns
Subject pronouns (I, he, she, we, they) are used when the pronoun is the subject of the verb. Object pronouns (me, him, her, us, them) are used everywhere else. Mixing them is a red-flag error in formal writing.
Subject pronoun — before the verb
<hl>She</hl> wrote the report.
'She' is the subject — it performs the action.
Object pronoun — after the verb or preposition
The manager praised <hl>her</hl>.
'Her' receives the action — it is the object.
Compound subject — use subject form
<hl>He</hl> and <hl>I</hl> submitted the application together.
Both pronouns are subjects — both take the subject form.
Compound object — use object form
The news surprised <hl>him</hl> and <hl>me</hl>.
Both pronouns receive the action — both take the object form.
Common Mistakes
Using object pronoun as subject
✗ Me and my colleague presented the findings.
My colleague and I presented the findings.
The pronouns are subjects here, so the subject form 'I' is required. 'Me' is an object pronoun — it cannot be a subject. Convention also puts the other person first: 'My colleague and I', not 'I and my colleague'.
Forgetting the subject in a clause
✗ Arrived late and missed the introduction.
She arrived late and missed the introduction.
Every English clause needs an explicit subject. Dropping the subject creates a sentence fragment — a serious error in formal writing.
Confusing dummy 'there' with the subject
✗ There are a lot of work to do.
There is a lot of work to do.
The verb agrees with the real subject — 'work' (uncountable, singular) — not with 'there'. Ask: what is there? 'A lot of work' → singular → 'is'.
Using infinitive subject with plural verb
✗ To make careless errors are unacceptable in this field.
To make careless errors is unacceptable in this field.
Infinitive phrase subjects are always grammatically singular, so they take a singular verb. 'To make … is' — not 'are'.
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