江苏省新沂市第二中学高中英语《Unit 4 Grammar and usage(2)》教案 新人教版选修6.doc

江苏省新沂市第二中学高中英语unit 4 grammar and usage(2)教案 新人教版选修6教学目标to recognize the kinds of the subjective mood in unreal conditional clauses .to grasp the usages of the other forms of the subjective .to finish some exercises about forms of the subjective重点to grasp the usages of the other forms of the subjective .难点to grasp the usages of the other forms of the subjective .教法及教具talking , practicing 教学过程教 学 内 容 个案调整教师主导活动学生主体活动introduction:虚拟语气在条件从句中的用法条件句有两类，一类是真实条件句，一类是虚拟条件句。如果假设的情况是有可能发生的，就是真实条件何。在这种真实条件句中的谓语用陈述语气。如: if it doesnt rain tomorrow, we will go to the park. 如果明天不下雨，我们就去公园。如果假设的情况是过去或现在都不存在的，或将来不大可能发生的，则是虚拟条件句。如: if he had seen you yesterday, he would have asked you about it. 如果他昨天见到你，他会问你这件事的。(事实上他昨天没见到你，因此也未能问你这件事。)在含有虚拟条件句的复合句中，主句和从句的谓语都要用虚拟语气。现将虚拟条件从句和主句的动词形式列表如下:从句动词形式主 句 动 词 形 式与现在事实相反动词的过去式（be的过去式一般用were）would/ should/ could/ might + 动词原形与过去事实相反had +过分would/ should/ could/ might + have + 过分与将来事实相反1.动词过去式2.should + 动词原形3.were to + 动词原形would/ should/ could/ might + 动词原形注: 主句中的should只用于i、we，但在美国英语中，should常被would代替；从句中的should 可用于各种人称。l.表示与现在事实相反的假设和结果。如：if my brother were here, everything would be all right. 2.表示与过去事实相反的假设和结果。如：if you had taken my advice，you wouldnt (couldnt) have failed in the exam. 如果你按照我的建议去做，你一定不会(不可能)考试不及格。3.表示与将来事实可能相反的假设和结果。如：if it were sunday tomorrow, i should (would，could，might) go to see my grandmother. 如果明天是星期天，我就 (可能)去看望我奶奶。if it were to snow this evening, they would not go out. 如果今晚下雪，他们将不出去了。4.有时条件从句中的动作和主句中的动作发生的时间不一致（表示错综时间的虚拟语气），这时动词的形式要根据它所表示的时间加以调整。例如：if you had listened to the doctor, you would be all right now. 如果你当初听了医生的话，身体现在就好了。(从句动作指过去，主句动作指现在) 5.虚拟条件句可以转换成下列形式（1）省略连词if。在书面语中，如果虚拟条件从句中有were，had或should，可以把if省略，把这几个词放到主语之前，构成主谓倒装。例如: should he come (if he should come), tell him to ring me up. 他要是来了，让他给我打个电话。were i you (if i were you), i would not do it. 我要是你，就不做这事。（2）用介词短语代替条件状语从句。如：without air (if there were not air), there would be no living things. 如果没有空气的话，就不会有生物了。but for your help (if it hadnt been for your help) i couldnt have done it. 要是没有你的帮助，我就不可能完成这件事。(3)用连词 otherwise, but, or i was busy that day. otherwise i would have gone there with them. (if i hadnt been busy that day, i would have gone there with them.) i