虚拟语气教案.docx

虚拟语气教案教学目标： 1.了解虚拟语气使用的条件和作用及其规则。 2. 各种从句中的虚拟语气 3要求使用虚拟语气的特殊句型。教学重点和难点：1 条件状语从句中的虚拟语气及if的省略2 虚拟从句中的错综时间句。教学步骤：1）虚拟语气的特点：1. 虚拟语气用以表示假定，想象，愿望等非事实的观念。2. 虚拟条件从句中的条件是假设的，因此主句的结论也只能是想象的，非事实的。3. 这些特点决定了它必须使用不同于真实句的动词形式2）虚拟语气在条件状语从句中的用法：条件从句If 从句的谓语形式主句的谓语形式现在V+ ed (were)would/could/should/might +V (原)过去had donewould/could/should/might+have+p.p.未来1. V. + ed.2. should+ V.(原)3. were to dowould/could/should/might +V.(原)3）虚拟语气用在宾语从句中：表示要求、命令、建议的动词后的宾语从句中要虚拟语气。形式是使用should + 动词原形，或者将should省略。常见动词: 一个坚持，两个命令， 三个建议，四个要求。即1) insist 2) order, command 3) advise, suggest, propose4) demand, require, request, ask4）虚拟语气用在同位语从句和表语从句中表示要求、命令、建议的动词所相应的名词构成的名词性从句包括主语从句、表语从句和同位语也要使用虚拟语气，从句中的动词形式为(should) + 动词原形常见词有：order, advice, suggestion, proposal, demand, request 5) 虚拟语气用在主语从句中Its necessary/strange/natural/ important/pity/no wonder/impossible /suggested/order/said/reported+ that 从句, 从句中的动词要用虚拟，即 (should) +动词原形6)虚拟语气用在特殊句型中1. wish 的宾语从句：现在: 过去时(were)过去: 过去完成时(had done)未来: would/could/might +V.(原) should不能用2. would rather that 现在: 过去时过去:过去完成时 未来:过去时3. as if /though + 从句 现在：过去时过去：过去完成时4. Its (about/high) time +that 过去时(were)过去完成时should(不省) +V.5. 虚拟语气用于If only 引导的感叹句中，“要是就好了”If only I were a flying bird!= How I wish I were a flying bird!要是我看过那部电影就好了！If only I had seen the film!=How I wish I had seen the film! 6.在含有If it were not for或If it had not been for 条件句的虚拟语气中If it had not been for your help, we couldnt have finished the work ahead of time.= But for your help= Without your help= Had it not been for your help,7.连词if的省略 如果虚拟条件句的谓语部分有were, had和should时, 可省略if, 把were, had和should放到从句主语前面去, 多见于书面语。Eg:要是没有你的帮助，我就失败了。 Had you not helped me, I should have failed.8. 混合型的条件句 当条件从句与主句所表的时间不一致时，虚拟语气的形式应作相应的调整。 主句和从句的谓语动词并不相互呼应，这种条件句叫混合条件句。较多见的 混合型条件句是从句用过去完成时（指过去行为），而主句用一般时（指目前状态）。Eg:如果他听了我的劝告，他现在会通过考试。He would pass the test if he had taken my advice.9.in case, for fear that “以防, 以免”He took his raincoat with him in case it should rain.=He took his raincoat with him for fear that it should rain. 他带上了雨衣, 以防下雨.