优化指导13-14学年高二英语课件（人教版，选修6）unit2Poems-section4GrammarWriting.ppt

;虚拟语气(Ⅱ) 1．主语从句中的虚拟语气 (1)“It is important(necessary，strange，natural，a pity等)＋that从句”句型中，从句的谓语动词常用“should＋动词原形”，should可以省略。 It is necessary that I (should) return it right now. 我有必要马上把它还回去。; (2)“It is ordered(decided，suggested，requested，required，proposed等)＋that从句”句型中，从句谓语动词用“should＋动词原形”，should可以省略。 It is required that the students (should) learn a foreign language. 学生们被要求学一门外语。 It was decided that the school should buy new software. 学校要购买新软件，这已经决定了下来。;2．表语从句和同位语从句中的虚拟语气 在表示建议、命令、要求、愿望等名词后面的表语从句和同位语从句中谓语动词用“(should)＋动词原形”。这类名词有：advice，suggestion，order，demand，proposal，request，desire等。 He made the demand that we should go at once. ＝His demand was that we should go at once. 他要求我们马上去。;3．as if/as though从句常用虚拟语气;温馨提示：as if /as though 如果有明显的迹象表示“有可能实现的事实”时，不用虚拟语气。 It is so cloudy.It looks as if it is going to rain. 阴天，似乎要下雨。;4．It’s time后的从句用虚拟语气 从句谓语动词常用过去时，也可用“should＋动词原形”，should不能省略。 It’s time (that) we had a meeting to talk about the problem. 该开个会讨论一下这个问题了。 It’s time (that) he went to bed/he should go to bed，but he is still watching TV. 该是他去睡觉的时候了，可他仍然在看电视。;5．在in case，for fear that，lest(唯恐，以免)，in order that，so that引导的目的状语从句中，谓语动词一般用“should/could/might＋动词原形”，其中should可省略。 I am afraid lest he (should) miss the train. 我担心他会错过了火车。 She walked quietly for fear that she might wake up the baby. 她轻轻地走，以免惊醒这个婴儿。 Have your gun ready in case we (should) need it. 把你的枪准备好，说不定我们会用得着。 He got up early in order that he could catch the first bus. 他起床很早，为了能赶上第一班公共汽车。;6．表示过去原打算干某事，却未能办到： wished/meant/intended/designed/planned/hoped＋to have done；had wished/meant/intended/designed/planned/hoped＋to do；was/were to＋have done was/were supposed to＋have done was/were expected to＋have done would like to＋have done I would like to have gone to the lecture，but I didn’t know the time. 我本想去听讲座的，但我不知道时间。; I had intended to inform you of the meeting，but I didn’t know your telephone number. 我本打算通知你开会的事，但我不知道你的电话号码。 You were supposed to have finished your composition yesterday. 你昨天就该写完你的作文。;7．在if only引导的感叹句中也要