Finite and non-finite verbs
A finite verb shows tense, agrees with its subject in person and number, and can stand alone as the main verb of a sentence, for example "she walks". A non-finite verb has no tense and does not agree with a subject; it appears as an infinitive, gerund or participle, for example "to walk", "walking", "walked" used without a subject.
Types of finite and non-finite verbs
Finite verbs
Verbs that change form to show tense, number and person, and act as the main verb governing the clause.
e.g. He runs every morning., They ran yesterday.
Infinitives (non-finite)
The base form of a verb, usually with 'to', showing no tense and not agreeing with any subject.
e.g. to eat, to have finished
Gerunds (non-finite)
The '-ing' form of a verb used as a noun, with no tense marking.
e.g. Swimming is healthy., I enjoy reading.
Participles (non-finite)
Present ('-ing') or past ('-ed/-en') verb forms used as adjectives or within verb phrases without carrying tense themselves.
e.g. the broken vase, Walking home, she smiled.
Rules to remember
- A finite verb must agree with its subject in person and number and shows a specific tense (present, past, future).
- Every independent clause needs at least one finite verb to be grammatically complete.
- Non-finite verbs (infinitives, gerunds, participles) cannot form a complete sentence alone because they carry no tense or subject agreement.
- A sentence can contain one finite verb and several non-finite verbs, as in 'She wants to learn to swim'.
- Non-finite verb forms often function as nouns, adjectives or adverbs within a clause, rather than as the main predicate.
Examples in sentences
| Example | How it works |
|---|---|
| The children play in the park every afternoon. | 'Play' is finite: it agrees with the plural subject and shows present tense. |
| She decided to leave early. | 'Decided' is finite; 'to leave' is a non-finite infinitive with no tense of its own. |
| Cooking dinner relaxes me after work. | 'Cooking' is a non-finite gerund acting as the subject; 'relaxes' is the finite verb. |
| Exhausted after the race, he sat down immediately. | 'Exhausted' is a non-finite past participle describing the subject; 'sat' is finite. |
| They want to travel and to explore new cultures. | Both infinitives are non-finite; 'want' is the only finite verb in the sentence. |
| Having finished her homework, Maria watched television. | 'Having finished' is a non-finite perfect participle showing an earlier action; 'watched' is finite. |
Common mistakes
Incorrect: She enjoy to swimming every day.
Correct: She enjoys swimming every day.
Incorrect: To finish the project, we working all night.
Correct: To finish the project, we worked all night.
Incorrect: He want finish his degree next year.
Correct: He wants to finish his degree next year.
Why this matters for IELTS
Using a correct mix of finite and non-finite verbs lets you build more complex, natural sentences, such as combining a finite main clause with infinitive or participle phrases, which examiners reward under Grammatical Range and Accuracy. Errors like missing subject-verb agreement on finite verbs, or wrongly giving tense to a non-finite form, are common accuracy losses, so checking that every clause has exactly one correctly formed finite verb is a quick, effective way to raise your band score.
Frequently asked questions
What is the main difference between finite and non-finite verbs?
Finite verbs show tense and agree with their subject, forming the main verb of a clause; non-finite verbs (infinitives, gerunds, participles) show no tense or subject agreement and cannot stand alone as the main verb.
Can a sentence have more than one finite verb?
Yes, if it contains more than one independent clause, each clause needs its own finite verb, for example 'She cooked dinner and he washed the dishes.'
Is 'to' always needed to identify an infinitive?
No, infinitives can appear without 'to' after certain verbs like 'can', 'must' or 'let', as in 'She can swim', where 'swim' is still a non-finite infinitive form.
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