if条件句的虚拟语气与倒装句课件

1、.虚拟语气与倒装句（教师版）什么是虚拟语气(subjunctive mood)?if i were you, i would not do like this. 要我是你，我就不会这样做i wish i became a millionaire. 要是我是个百万富翁多好啊口头解释上面两个例句后引出虚拟语气的概念表示说的话不是真实发生，只是一种假设，主观愿望，猜测，建议等非真实的情况。今天主要讲在条件句中虚拟语气的使用情况q: 那是不是所有的条件句都用虚拟语气？ 这里可以提问同学，进行互动后给出正确答案一分类1. 真实条件句，表示的假设是有可能发生的，此时主句不用虚拟语气。e.g. if i h

2、ave time, i will do the homework. (口头解释分析这个句子)2. 虚拟条件句，表示的是一种假象，与事实相反或不太可能会发生，那就要用虚拟语气e.g. if i were you, i would do the homework. (口头解释分析这个句子)二用法时态类型主句从句例句与现在事实相反主语+would/should/could/might+ doif+主语+did (be动词用were)1. if i were you, i should work hard.2. the bedroom would be so clean if i had time.与

3、过去事实相反主语+would/should/could/might + have doneif+主语+had done1. if i had finished my homework,i would have passed that test.2. if i had left a little earlier, i would have caught the train.与将来事实相反主语+would/should/could/might + doif+主语+did（可能性一般）if+主语+should +do（可能性最大）if+主语+were to + do（可能性最小）1.if you c

4、ame tomorrow, we would have the meeting. 2. if it were to rain tomorrow, the meeting would be put off.总结：从句都往过去推一个时态。与现在相反-过去 ， 与过去相反-过去的过去（过去完成），与将来相反-过去精品.三重点解析1. l would/should/could/might主句谓语中的should主要用于第一人称后；would表示结果还表示过去常常做某事，might表示可能性，could表示能力、允许或可能性。比较：if you tried again，you would succeed

5、. 要是你再试一试，你就会成功的。(would表结果)if you tried again， you might succeed. 要是你再试一试，你可能会成功的。(might表可能)if you tried again ，you could succeed. 要是你再试一试，你就能成功了。(could表能力)2. 错综时间虚拟条件句：即条件从句与主句所指时间不一致，如从句指过去，而主句即指的是现在或将来，此时应根据具体的语境情况，结合上面提到的三种基本类型对时态作相应的调整if it had rained last night, the ground would be wet now. 要是

6、昨晚下过雨的话，现在地面就会是湿的。if he were free today, we would sent him to beijing.如果他今天有空的话，我们就已经派他去北京。 3. if虚拟条件句的倒装形式：即把were, had, should置于句首，if可省略;。e.g. were i in school again (= if i were in school again), i would work harder.如果我能再上一次学，我会学习得更努力。had you asked me, i would have told you. (=if you had asked me,)如果你问我，我会告诉你。四巩固检测1. if i were you, i would take an umbrella (如果我是你，我会带把伞)2. if i had gotten there earlier, i should/could met her.(如果我早点到，我就会见到她)3. if there were a heavy snow next sunday, we would not go skating. (如果下周日下大雪，我们就不能去滑冰了)4. if it should snow tomorrow ，i would