Not all verbs do the same job. Some carry the main meaning, others just help build the grammar — knowing which is which makes everything else easier.
What you'll learn
The main verb carries the core meaning of a sentence. Auxiliary and modal verbs are 'helping verbs' — they combine with a main verb to build tenses, questions, negatives, or extra meaning, rather than carrying meaning on their own.
Be, do, and have act as auxiliaries to build continuous tenses (be), questions and negatives in simple tenses (do), and perfect tenses (have).
Modal verbs (can, could, may, might, must, shall, should, will, would) add a layer of meaning — ability, permission, obligation, possibility — and are always followed by the base form of the main verb, with no to and no -s.
A phrasal verb combines a verb with one or more particles (up, on, off, into...) to create a meaning that's often very different from the individual words — look up (search for information), give up (stop trying), run into (meet by chance).
Modal verbs are followed directly by the base form — never by to.
Modal verbs never take -s, even for he/she/it.
A yes/no question in the present simple needs the auxiliary do/does — it can't be formed with just intonation.
"Do you want to hang out this weekend?"
"I might be busy on Saturday, but Sunday should work."
"Great, I'll look into some restaurant options."
"Sounds good — let me know what you find."
Exercise 1 · Find the main verb
In 'She is reading', which word is the main verb?
Exercise 2 · Choose the correct answer
Which of these is a modal verb?
Exercise 3 · Find the auxiliary
In 'They have finished', which word is the auxiliary verb?
Exercise 4 · Choose the correct answer
'Look up' (meaning 'search for information') is an example of a ___.
Exercise 5 · Choose the correct sentence
Which sentence uses a modal verb?
Exercise 6 · Find the auxiliary
In 'Does she work here?', which word is the auxiliary?
Exercise 7 · Choose the correct answer
Which is a main verb, not an auxiliary or modal?
Exercise 8 · Complete the sentence
Complete: 'give up' meaning 'stop trying' is an example of a ___ ___ verb. (two words)
Exercise 9 · Complete the sentence
Complete: In 'I must leave now', 'must' is a ___ verb.
Exercise 10 · Sort into groups
0 / 6 sorted
Exercise 11 · Choose the correct answer
Which best describes 'be', 'do', and 'have' when used as auxiliaries?
Five quick questions to check what stuck.
Question 1 / 5
Score: 0/0
In 'I will call you later', which word is the modal verb?
Regular and Irregular Verbs
Learn how regular verbs form the past simple predictably with -ed, why irregular verbs don't follow spelling rules, and why the past form never changes for the subject.
Auxiliary Verbs
Go deeper into be, do, and have as auxiliary (helping) verbs — how they build questions, negatives, continuous and perfect tenses, the passive voice, and emphasis — and how to tell an auxiliary use apart from a main-verb use.
Stative vs. Dynamic Verbs
Learn which English verbs describe states (know, like, want, believe) rather than actions, why they normally avoid continuous forms, and how some verbs like think, have, and taste switch meaning between stative and dynamic use.
Verb Forms
Learn the five basic forms of an English verb — base, -s, -ing, past, and past participle — and how the -ing and past participle forms get reused across many different constructions.