Differentiate regular verb from irregular verb?

Answer 1

to plant, ~ed, ~ed

to dance, ~ed (danced), ~ed (danced).

REGULAR

to fly, flew, flown

to be, was/were, been

to have, had, had,

to cut, cut, cut

IRREGULAR

Regular verbs end in -ed in their past tense form.

Answer 2

Regular verbs form their past tense and past participle by adding "-ed" to the base form (e.g. walk, walked, walked), while irregular verbs do not follow a standard pattern and their past tense and past participle forms differ from the base form (e.g. go, went, gone).