Present perfect 1

The form
have / has + past participle

For regular verbs the past participle is the same as the past simple: finished, decided, lived. Many common verbs are irregular and have a third form.

BasePast simplePast participle
gowentgone
seesawseen
dodiddone
writewrotewritten
eatateeaten
bewas / werebeen
PositiveNegativeQuestion
I / you / we / theyI've seenI haven't seenHave you seen?
he / she / itShe's seenShe hasn't seenHas she seen?