[大学英语学习必备]虚拟语气讲解.pptVIP

虚拟语气是一种特殊的动词形式，一是用来表示说话人所说的话不是一个事实，而是一种假设、猜测、怀疑等(在条件从句中或让步状语从句中)；一是表示说话人的愿望、要求、命令、建议等 (在宾语从句、表语从句、同位语从句)。 eg:If I had time, I would attend the meeting. If he had hurried ,he could have caught the train. If I were to go abroad ,I would go to America. A.在句型 “It is important (necessary, strange, natural) that .... ” 中，that 后面的从句中的谓语动词用： should + 动词原形 我们有必要出去散散步。 It’s necessary that we should have a walk now.  2 她这样做是很自然的。 It’s natural that she should do so.  3 重要的是我们要照顾好病人。 It’s important that we should take good care of the patient.  * * 语气 英语的动词一般可带有三种不同的语气：陈述语气，祈使语气和虚拟语气。不同的语气用动词的不同形式（有的还借助句法形式）来表示。 虚拟语气 虚拟语气的概念 　一、虚拟语气在条件句中 与将来相反的假设 与过去相反的假设 与现在事实相反的假设 　　　主句 　　虚拟条件句 If+主语+动词的过去式 （动词be用were) 主语+should,would, might,could＋动词 原形 If+主语+had +过去分词 主语＋should, would, might, could ＋have done 1、If+主语+动词过去式 2、If+主语+were to+ 动词原形 3、If+主语+should +动词原形 主语＋should, would might, could＋动词 原形 如果我是你，我就会努力学习． 如果我知道他的电话号码，我就给他打电话了． 如果明天下雨的话，我们会取消比赛． If I were you, I would work harder at my lessons. If I had known his telephone number, I would have called him. If it should \were to rain, we would call off the match. More practice: 使用虚拟条件句要注意的几点： １．　当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为：错综时间条件句“，动词的形式要根据它所表示的时间作出相应的调整． If you had followed my advice , you would be better now. If you had studied hard before, you would be a college student now. 如果你当初听我的建议，你现在就会痊愈了． 如果你努力学习的话，你现在就会是大学生了． ２．省略句 在条件句中，可省略 if，把were ,had, should 提到句首，变为倒装句式． If I were at school again, I would study harder. Were I at school again, I would study harder. If you had come earlier, you would have met him. Had you come earlier, you would have met him. If it should rain tomorrow, we would not go climbing. Should it rain tomorrow, we would not go climbing. 二、虚拟语气在名词从句中的运用 （1）用于宾语从句 １、wish 后面的宾语从句中。 一般用虚拟语气，表示一种不可能实现的愿望。其谓语动词形式为： 表现在　过去时 表过去　过去完成时 表将来　would, might, could＋动词原形 I wish (that) I were a bird. I wish (that) I had seen the film last night. I wish (th