have done和have been done
have done和have been done都表示的是現(xiàn)在完成時(shí),having done和having been done都是動(dòng)詞ing的完成形式,在句子中作狀語(yǔ),起到補(bǔ)充說(shuō)明的作用。這里要注意的是,having所接的動(dòng)詞發(fā)生的時(shí)間在主句中謂語(yǔ)動(dòng)詞發(fā)生的時(shí)間之前。比如:Having driven all day,we were so tired.這個(gè)例子中,having driven表示“我們”的狀態(tài),“開(kāi)了一天的車(chē)”,并且drive的動(dòng)作發(fā)生在be tired的之前。