虚拟语气及答案虚拟语气及答案.doc

虚拟语气(Subjunctive Mood)这一语法项目是各类英语考试中心测试的重点之一。虚拟语气是一种特殊的动词形式，用来表示说话人所说的话并不是事实，而是一种假设、愿望、怀疑或推测。判断是真实条件句还是非真实条件句。只有在非真实条件句中才使用虚拟语气。通过句子意思，看假设的条件是否能够实现，能够实现是真实条件句，不能使用虚拟语气；假设的条件不能实现则是非真实条件句，要用虚拟语气.判断这个假设是与哪个事实相反。通常有三种情况：①与过去事实相反。②与现在事实相反。③与将来事实可能相反 I: 最基本的虚拟语气句型: 1. 虚拟现在时表示与现在事实相反的假设，其if 从句的谓语形式用动词的过 去式(be 一般用were)，主句用would/ should/ could/ might +动词原形。 　 If places were a like, there would be little need for geographers. 如果各个地方都一样，就不需要地理学家了。 2. 虚拟过去时是表示与过去事实相反的假设，if 从句的谓语形式用过去完成时 即had＋过去分词，主句用would / should / could / might + have +过去分词。 　 If he had known your address yesterday, he would have telephoned you. 3. 虚拟将来时是表示对将来实现的可能性很小的或不确定的假设。If从句的谓 语形式用一般过去式或用were to / should +动词原形，主句用would / should /could/ might +动词原形。 　 If he were to leave today, he would get there by Friday 4. 省略if 采用倒装语序的条件句。 　 有时可以把含有助动词、情态动词、be或have的虚拟条件句中的连词if 省去，而将had , should, were 等 词 提到主语之前，即用倒装结构。 　 Had he worked harder, he would have got through the exams. Were he to leave today, he would get there by Friday. Were I in your place, I wouldnt do that 5. 有时虚拟条件句并没来if 从句表示出来，而是用介词短语(otherwise, or, without, but for)、上下文或其它方式来表示。 　 We didnt know his telephone number; otherwise we would have telephoned him. Without you help, I wouldnt have achieved so much. But for your help, I would not have succeeded. II: 虚拟语气在从句中用should的情况: 1. 在建议,要求,命令,想法后的动词后的从句里, 用should + 动词原形, should 可以省略. 如 advise, agree, command, decide, demand, determine, grant, indicate, insist, order, prefer, propose, request, require, stipulate, suggest, urge, vote. 常考到的是: suggest, advise, demand, require, propose, insist, order, request. His doctor suggested that he (should) take short leave of absence. The author proposed that TV (should) be turned off at least one hour every day. 2. 在建议,要求,命令,想法后的名词后的从句里, 用should + 动词原形, should可以省略. 如 advice, agreement, command, decision, decree, demand, determination, indication, insistence, order, preference, proposal, request, requirement, stipulation etc. It was Bills su