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ve days ago / since 1996/ since I came to this school) 例:They have lived here since 1996. She has taught us since I came to this school I have known LiLei for three years .How long has she had the job ?注意:非延續(xù)性動詞(瞬間動詞)在現(xiàn)在完成時態(tài)中不能和for, since, how long等引導(dǎo)的時間連用。應(yīng)轉(zhuǎn)為相應(yīng)的延續(xù)性動詞, 如:buy(買) have die(死) be dead go / leave(離開) be away (from) borrow / lend(借) keep open be open e be here put on wear close be closed lose not have start/ begin be on finish be over fall asleep