【正文】
yer had been here last Saturday, he would have prevented me from going. If he had e yesterday, I should / would have told him about it. 含義:He did not e yesterday, so I did not tell him about it. If he had not been ill and missed many classes, he would have made greater progress. 含義: He was ill and missed many lessons, so he did not make greater progress. c. 表示對(duì)將來(lái)的假想 句型: 條件從句 主句 一般過(guò)去時(shí) should+ 動(dòng)詞原形 were+ 不定式 would + 動(dòng)詞原形 should+ 動(dòng)詞原形 If you succeeded, everything would be all right. If you should succeed, everything would be all right. If you were to succeed, everything would be all right.3 混合條件句 主句與從句的動(dòng)作發(fā)生在不同的時(shí)間,這時(shí)主,從句謂語(yǔ)動(dòng)詞的虛擬語(yǔ)氣形式因時(shí)間不同而不同,這叫做混合條件句。a. 同現(xiàn)在事實(shí)相反的假設(shè)。2 非真實(shí)條件句1)時(shí)態(tài):可以表示過(guò)去,現(xiàn)在和將來(lái)的情況。真實(shí)條件句主句為將來(lái)時(shí),從句用一般現(xiàn)在時(shí)。1 真實(shí)條件句 真實(shí)條件句用于陳述語(yǔ)氣,假設(shè)的情況可能發(fā)生,其中 if 是如果的意思?! r(shí)態(tài)關(guān)系句型: 條件從句 主句 一般現(xiàn)在時(shí) shall/will + 動(dòng)詞原形 If he es, he will bring his violin.典型例題 The volleyball match will be put off if it ___. A. will rain B. rains C. rained D. is rained 答案B。注意:1) 在真實(shí)條件句中,主句不能用be going to表示將來(lái),該用shall, will. (錯(cuò)) If you leave n