高考英语易错点：虚拟语气
　　I 虚拟语气在if 引导的条件句中的易错点。
　　① if my lawyer had been here last Saturday, he would have prevented me from going.
　　② if you had studied hard at school, you would be a college student now.
　　句子①②都是虚拟语气在条件句中的使用，从句中都是假设过去的情况，所以用过去完成时，但在主句中，句①依然指代过去的情况，谓语动词是would have done，而②中含有一个表示现在的时间状语now, 这样就必须将其理解为假设现在的情况，所以谓语动词必须为would/should/might+动词原形，学生在这一点上经常会忽略now的存在，从而按句①的形式填写答案。
　　Ⅱ虚拟语气在名词性从句中的用法
　　1.在it is important (strange, natural, necessary……)+that 句子或者It is decided (ordered, suggested, demanded, advised……)+that句子中，主语从句中的谓语动词常用(should)+动词原形结构，表示某事“重要”、“必要”、“被决定”等
　　例如：① it is important that everyone (should ) obey the rules all day and all night.
　　② it is decided that the meeting (should) be held tomorrow afternoon.
　　2. suggest, insist 后面指宾语从句时需注意的地方
　　1)①suggest 当“建议”“提出”讲时，其后宾语从句的谓语动词常用“should+动词原形”
　　例如：He suggested that the work (should) be started at once 他建议立即动工。
　　类似的动词还有insist坚持，demand要求，desire要求、请求，request请求，require要求、需要，order命令，propose建议，command命令，ask要求，advise建议，prefer宁愿等。
　　这些动词变被动语态(如：It is suggested + that主语从句)形式后，主语从句谓语动词仍用“(should)+动词原形”
　　这些动词变名词(如suggestion)后，其后的表语从句和同位语从句中的谓语部分仍用“(should)+动词原形”
　　②suggest 当“提出(某看法)，暗示，启发”讲时，其后宾语从句的动词不用虚拟语气。
　　例如：(1)The police suggested that the thief might be one of the family member
　　警察局提出窃贼可能是一名家庭成员。
　　(2)Her yawns suggests that she is sleepy. 她打哈欠表明她困了。
　　(3)Although he didn’t suggest that we __ the decision to swim across the river, but his look suggested that our decision __wrong.虽然他没提出我们应该终止游过这条河的决定，但他的表情表明我们的决定是错误的。
　　A：stop; was B: should stop; be C: stopped ;was D: stopped; should be
　　在这个句子中，前一个suggest当“建议”“提出”讲，而后一个作“表明”讲，所以答案为“A”
　　2)①insist作“坚决要求…该…;坚持认为…定要…”讲时，其后宾语从句的谓语动词用“(should)+动词原形”
　　例如：I insisted that you (should) be there on time.我坚持认为你应该准时到那里去
　　②insist 作“坚持(意见，看法);坚持说，确信”讲时，其后从句不用虚拟语气。
　　例如：He suggested (that) he heard someone in the next room. 他坚持说他听到隔壁屋子里有人。

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