Verbs are two kinds. 1) Mani Verb 2) Helping (Auxiliary) verbs.
Main Verbs are innumerable.
Helping Verbs are just 27. They are a) Be-forms, b) Do forms c)Have forms d) Modal auxiliaries.
Please go back to older posts for the detailed notes on these Helping Verbs.
Every Main Verb has 5 forms. Some verbs don't change in V2 and V3 forms. They are called Regular verbs Ex: PLAY-PLAYED-PLAYED
But some other Main Verbs take different forms in V2 and V3 forms. They are called IRREGULAR VERBS .Example is given below:
1) TAKE : V1 or Present Tense or Base form
2) TOOK : V2 or Past Tense
3) TAKEN : V3 or Past Participle ( Not Future Tense)
4) TAKES : 'S' form , Present Tense -singular
5) TAKING : 'ing' form or Present Participle ( Not Present Tense, but Present Participle)