2016-2017学年高中英语 Module 5 Cloning Section 3 Grammar课件 外研版选修6.ppt

Section Ⅲ 　Grammar 虚拟语气(Ⅰ) 一、虚拟语气在非真实条件句中的用法 If my brother were here，everything would be all right. 要是我哥哥在这儿，一切都没问题了。(与现在事实相反) If I had enough money，I would take the beautiful dress for my daughter. 如果我的钱够的话，我就会为女儿买下这件漂亮的礼服。(与现在事实相反) If you had got up earlier，you would have caught the train. 如果你早点起床，你就会赶上火车了。(与过去事实相反) If it should rain/were to rain/rained tomorrow，we would have to put off the sports meeting. 如果明天下雨的话，我们就得推迟运动会。(与将来事实相反) 二、虚拟条件的三种特殊形式 1．省略if的虚拟语气 虚拟条件句中若含有were，had或should，可以把if省略，把were，had或should提到句首，构成部分倒装。 Were it Sunday tomorrow，we should go to the Great Wall. 要是明天是星期日，我们就能去长城了。 Had I taken my father’s suggestion，I would have done it better.如果我听从了父亲的建议，我会做得更好。 Should it rain tomorrow，the sports meeting would be put off.如果明天下雨，运动会就会被推迟。 名师点津：若省略的条件句中的谓语动词是否定形式，则不能用动词的缩略形式。我们可以说“Were it not for the expense，I would go abroad now.”但不能说“Weren’t it for the expense，I would go abroad now.”。 2．错综时间条件句 在虚拟语气中，条件从句中谓语可以和主句中的谓语发生时间不一致，这时从句和主句要根据各自所发生的时间选用符合具体时间的虚拟语气形式。 If you had prepared in advance，you wouldn’t be in such an awkward position now. 如果你事先做好准备，现在就不至于那么被动。(从句表示过去，主句表示现在) If I were you，I would have gone to his birthday party yesterday. 如果我是你，我昨天就去参加他的生日宴会了。(从句表示现在，主句表示过去) 3．含蓄虚拟条件句 有时假设的情况不是以if条件从句表示，而是通过其他形式表现出来，这种从句被称作含蓄虚拟条件句，其主要用法如下。 (1)用but for，without等介词(短语)表示条件。 But for the rain we should have had a pleasant journey. 要不是下雨，我们会有一次愉快的旅行。 (2)用连词otherwise，or等暗示后文与前面的情况相反，从而引出后文的虚拟语气。 There was a traffic jam on the way，otherwise I would have arrived an hour ago.路上堵车，要不然我一小时前就到了。 (3)虚拟条件通过but暗示出来，but前面为虚拟语气，后面为真实情况。 I should have given you more help，but I was too busy. 我本该多帮帮你，但我太忙了。 Ⅰ.用括号内动词的适当形式填空 1．If I had enough money now，I ___________(buy) a car. 答案：　would buy 2．If we________________(drive) in turn，you wouldn’t have got so tired. 答案：　had driven 3．If it________________(snow) tomorrow，we would take photos. 答案：　were to snow 4．If you ________________(listen) to me yesterday，you wouldn’t be in such trouble now. 答案：　had listened 5．If I_______