A verb phrase is the complete verb element of a clause: the main (lexical) verb plus any auxiliary or modal verbs that precede it. For example, in She might have been working late, the verb phrase might have been working combines a modal, a perfect auxiliary, and a continuous auxiliary with the main verb work. The verb phrase carries the grammatical information a sentence needs — tense, aspect, voice and modality — while the main verb carries the core meaning. Reference grammars such as the Cambridge Grammar treat the verb phrase as one of the two essential parts of every clause, alongside the subject.
What Is a Verb Phrase?
In its simplest form, a verb phrase is a single word: runs, ate, sleep. In its fuller forms, it can contain up to four auxiliary verbs stacked before the main verb to express combinations of tense, aspect, voice and modality.
- eats (simple, one word)
- is eating (auxiliary be + present participle)
- has eaten (auxiliary have + past participle)
- might have been eaten (modal + have + been + past participle: modal + perfect + passive)
Formation: The Building Blocks
| Structure | Formula | Example |
|---|---|---|
| Simple | main verb | She works from home. |
| Continuous / progressive | be + -ing | She is working from home. |
| Perfect | have + past participle | She has worked from home. |
| Perfect continuous | have + been + -ing | She has been working from home. |
| Passive | be + past participle | The report is written by her. |
| Modal | modal + bare infinitive | She might work from home tomorrow. |
| Modal + perfect + passive | modal + have + been + past participle | It might have been written yesterday. |
Why the Order of Auxiliaries Matters
Auxiliary verbs always appear in the same fixed order: modal → perfect (have) → continuous (be) → passive (be), followed by the main verb in the appropriate form (bare infinitive, past participle, or present participle). Reversing this order produces an ungrammatical sentence.
- Correct: The letter might have been being written when the power went out. (modal + perfect + continuous + passive)
- Wrong: The letter been have might written…
Common Mistakes
- Wrong: She don’t like coffee. Correct: She doesn’t like coffee. (auxiliary do must agree with the subject in the third person singular)
- Wrong: He didn’t went to the party. Correct: He didn’t go to the party. (once did carries the past tense, the main verb returns to its base form)
- Wrong: The cake was eating by the children. Correct: The cake was eaten by the children. (passive requires the past participle, not the present participle)
- Wrong: I am not agree. Correct: I do not agree. (‘agree’ is a normal verb, not an adjective, so it does not use be in the negative)
Practice Exercises
Grammar Quiz
Identify the correct verb phrase structure in context sentences.
Cloze Dropdown
Choose the correctly ordered auxiliary and main verb combination.
Complete the Sentence
Build the correct verb phrase to complete each sentence stem.
Match-Up
Match verb phrase structures to the meaning they express.
Flash Cards
Drill auxiliary + main verb combinations until they feel automatic.
Practice What You’ve Learned
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Frequently Asked Questions
What is a verb phrase?
A verb phrase is the main verb of a clause plus any auxiliary or modal verbs before it. It carries the grammatical information of the sentence — tense, aspect, voice, modality — while the main verb supplies the core meaning. Example: might have been written is a single verb phrase.
What is the difference between a main verb and an auxiliary verb?
The main verb (also called the lexical verb) carries the meaning of the action or state: eat, write, sleep. Auxiliary verbs (be, have, do, and modals) support the main verb grammatically, showing tense, aspect, voice, negation, or modality: is eating, has written, doesn’t sleep, might write.
In what order do auxiliary verbs appear in a verb phrase?
The fixed order is modal → perfect (have) → continuous (be) → passive (be), followed by the main verb: might have been being written. Each auxiliary determines the form of the word that follows it — have takes a past participle, be takes an -ing or past participle.
Why is ‘she don’t like coffee’ wrong?
The auxiliary ‘do’ must agree with its subject in person and number. With third-person singular subjects (he, she, it), the correct auxiliary is ‘does’ (or its negative ‘doesn’t’): She doesn’t like coffee. The verb agreement moves onto the auxiliary, not the main verb.
Why do we say ‘he didn’t go’ and not ‘he didn’t went’?
Once the auxiliary ‘did’ carries the past tense marking, the main verb returns to its base (bare infinitive) form. The tense is only marked once in the verb phrase — on the auxiliary — never twice.
What form does the main verb take after ‘have’ in a perfect verb phrase?
After any form of ‘have’ used as a perfect auxiliary, the following verb takes the past participle form: has eaten, had finished, will have arrived. This holds true regardless of how many other auxiliaries appear before ‘have’ in the verb phrase.
What form does the main verb take in a passive verb phrase?
A passive verb phrase always ends in ‘be’ (in some form) plus the past participle: is written, was being written, has been written, might be written. Using the present participle instead (‘is writing’ where a passive is intended) reverses the meaning of who performs the action.
Can a verb phrase include more than one modal verb?
No. Standard English allows only one modal verb per verb phrase. To combine two modal-like meanings, a semi-modal is used after the true modal: might have to leave (not ‘might must leave’). This is different from some regional dialects, which do occasionally stack modals informally.
Is ‘I am not agree’ correct?
No. ‘Agree’ is an ordinary verb, not an adjective, so its negative uses the auxiliary ‘do’, not ‘be’: I do not agree or I don’t agree. This confusion is common among learners whose first language expresses this idea with a linking verb.
Why is understanding verb phrase structure useful for exams?
Accurate control of complex verb phrases — especially modal + perfect + passive combinations like ‘should have been informed’ — is one of the clearest markers of C1-level grammatical range in Cambridge and IELTS writing and speaking assessments. Errors in auxiliary order or participle form are penalised directly under grammatical accuracy criteria.