虚拟语气在从句中的用法.doc

从句类型句型结构关键词虚拟形式主语从句It is important that 表判断：important, necessary, desirable, imperative, advisable, appropriate(should) do.It is suggested that 表希望、建议：suggested, proposed, requested, decided, settled, desired宾语从句I wish that表愿望：wish, would rather, would sooner过去式：与现在事实相反、与将来事实相反过去完成时：与过去事实相反I suggest that表建议、请求：suggest, propose, require, demand, order, arrange, insist, command, request, desire（Should）doI am glad thatI regret that。表示喜怒哀乐等感情形容词和动词：ashamed, glad, anxious, pleased, sorry; marvel, puzzle, regret, rejoice, wonder(Should )+ doShould + have + done表语从句The suggestion is that表建议、计划等：suggestion, request, idea, proposal, motion, demand, desire, order, plan, regulation, requirement(Should) +do同位语从句It is the suggestion that.定语从句It is time thattime过去式I. 虚拟语气在从句中的用法II、虚拟语气用于非真实条件句条件从句结果主句与现在事实相反If I (we, you, he, they) +动词过去式（be的动词过去式用were）I (We)should +doYou would +doHe would +doThey would +do与过去事实相反If I (we, you, he, they) +had +过去分词I(We)should +have doneYou would +have doneHe would +have doneThey would +have done与将来事实相反If I (we, you, he, they) + 动词过去式（be的过去式用were）I (We)should +doYou would +doHe would +doThey would +doIf I (we, you, he, they) +were to + doIf I (we, you, he, they) +should + do与将来事实相反：1 If the ship left at noon, it would pass through the canal between 2:00 and 2:30 p.m.2 If the ship should leave at noon, it would pass through the canal between 2:00 and 2:30 p.m.3 If the ship were to leave at noon, it would pass through the canal between 2:00 and 2:30 p.m. III. 连词if的省略：在书面语中，条件从句可以不用连词if，而将谓语中的过去式were、had或should等移至主语之前：1. Were you in my position, you would do the same.2. Had he been in your position, hed probably have done the same.3. Should they attack us, well wipe them out completely.4. Had I time, I would come.5. I will go, should it be necessary.IV、条件从句与结果主句所表的时间不一致：1. If I had spoken to him yesterday, I should know what to do now.2. You would be much better now if you had taken my advice.V、含蓄条件句：1. What would I have done without you?2. The same thing, happening in war time, would amount to disaster.3. But for your help we wouldnt have succeeded in the experiment.4. Alone, he would have been terrified.VI、省去结果主句的非真实条件句1、 If only you would listen to reason.2、 If only he were here.3、 If only I had never been married.VII、不用If引导的条件从句非真实条件句中的条件从句除了用If 引导外，还可以用when, unless, lest, suppose, as if, for fear, in case, on condition 等