What is the difference between regular and irregular verbs?
Regular verbs behave the same when going from one tense to the other:
Present tense
I walk
we walk
you walk
you walk
he/she/it walks
they walk
Past tense
I walked
we walked
you walked
you walked
he/she/it walked
they walked
Future tense
I will (shall) walk
we will (shall) walk
you will walk
you will walk
he/she/it will walk
they will walk
Present perfect tense
I have walked
we have walked
you have walked
you have walked
he/she/it has walked
they have walked
Past perfect tense
I had walked
we had walked
you had walked
you had walked
he/she/it had walked
they had walked
Future perfect tense
I will have walked
we will have walked
you will have walked
you will have walked
he/she/it will have walked
they will have walked
Irregular verbs are just that: They don't follow any fixed rules as the tense changes. Unfortunately, these are among the most commonly used verbs -- you must memorize them or look them up in a dictionary.
