Question

why the verbs have three forms?​

Answer 1

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Main verbs have three basic forms: The base 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 (He opened the door and went out.)

• -ed Form: used after auxiliary have and be (I’ve always wanted a piano and I was given one last week.)

Answer 2

$Main \: verbs \: have \: three \: basic \: forms: \: the \: base \: form, \: the \: past \: form \: and \: the \: -ed \: form (sometimes \: called \: the \: '-ed \: participle'):$