present(now)futurepast 现在完成时现在完成时(present perfect tense)do my homework Mother:John,clean your teeth please.John:Mum,I have have alreadyalready(已经已经已经已经)cleaned)cleaned b your hair -have combed it wash your hands-have washed them study for English test-have studied for it tell me the truth-have told you everything visit your grandpa-have visited him listen to the English tape-have listened to itMother:John,clean your teeth please.John:Mum,I have already cleaned them.Father:Tell your sister to buy
