Question

four forms of verb calss8

Answer 1

form, the past form and the -ed form (sometimes called the ‘-ed participle’):
base form: used as the infinitive form, with to or without to (Do you want to come with us? I can’t leave now.) and for the present simple (I always read before I go to sleep every night.) except third person singular, which uses the -s form (She works at the university.)
past form: used for the past simple (Heopened the door and went out.)
-ed form: used after auxiliary have and be(I’ve always wanted a piano and I was givenone last week.).

Answer 2

Simple
Continouse
Perfect
Perfect continuose