過去虛擬條件句時(shí)態(tài)：if +had+動(dòng)詞過去分詞,所以選Bifsb had done ... ,... would have done ifsbdid/ were ... , ...would do .... 這種形式才對(duì)啊說得好這是錯(cuò)綜條件句結(jié)果主句和條件從句的謂語動(dòng)作若不是同時(shí)發(fā)生時(shí)，虛擬語氣的形式應(yīng)作相應(yīng)的調(diào)整。從句的動(dòng)作與過去事實(shí)相反，而主句的動(dòng)作與現(xiàn)在或現(xiàn)在正在發(fā)生的事實(shí)不符eg：If I had worked hard at school,I would be an engineer,too. 如果我在學(xué)校學(xué)習(xí)刻苦的話，我現(xiàn)在也會(huì)成為一個(gè)工程師了If they had informed us,we would not come here now. 如果他們通知過我們的話，我們現(xiàn)在就不會(huì)來這里了 相信你能明白了吧