高考情态动词与虚拟语气

1、情态动词高考涉及的几个要点：一、表达推测的意思肯定：must/ may/ might否定：cant/couldnt / may not/ might not疑问：can/coulde.g. He bought ten cars. He must be crazy about cars. He is in London. He cant take part in your party. He has changed his name. Can it be true?注意：should 也可以用作推测e.g. He should be back soon.二、情态动词have done1表示对过去

2、的推测e.g. The ground is wet. It must have rained last night.2. 表示本来应该可以，但实际未做到e.g. He should have warned me of the danger in advance. She could have met Lily if she hadnt met the traffic jam.三. shall / should 的特殊含义1. shall 用于一三人称疑问句表示征询意见e.g. Shall he come in?2. shall 用于二三人称表示命令警告威胁等e.g. You shall nev

3、er meet him if you dont come tonight.He shall do as I tell him.3. should用于疑问句，表示惊讶，认为不该发生等意思，相当于竟然e.g. Should the boy kill the strong man?四. 几个问答不一致的情态动词. Must I hand it in today? Yes, you must. No, you neednt. / you dont have to.2. May I open the window? Yes, you may. No, you mustnt.3. Need I check

4、 all the new words I meet ? Yes, you must. No, you dont have to. / You neednt.五Dare/ need 的用法他们既可做实意动词，又可做情态动词一般在肯定句中做实意动词，疑问否定句中做情态动词实意动词情态动词肯定句need to doNeed do否定句dont /doesnt need to doNeednt do疑问句Do/does sb. need to do sth?Need sb. do sth.e.g. I need to know the weather condition. He neednt use

5、the computer. How dare you say that?判断正误：I dont need say it to you again. Does he need call you every day? He neednt to teach you how to be a real man. 虚拟语气一、条件状语从句的用法 1、三种基本形式(p.271)1). 与现在事实相反e.g. If I were you, I would do it. If I knew the answer, I would tell you.2). 与将来事实相反e.g. If I were to pla

6、y football, he would laugh at me.If you didnt go to college, you wouldnt find a good job.If I should own a company, I would invite you to join me.3). 与过去事实相反e.g. If I had come earlier, I would have met him.2、倒装(p.271)e.g. 1).Were I you, I would help him. 2).Had he arrived , I would have called on hi

7、m. 3).Should he leave the company, I would do the same.3、省略（p.271）e.g. 1). Without(But for) you, I wouldnt finish the task. 2). Given more care, the plant would grow better. 二、+should do的句式should可以省略1、主语从句（p.272） e.g. Its necessary that the problem should be discussed at once. It is suggested that t

8、he meeting should be put off.2、宾语从句（p.272） e.g. He ordered that the medicine should be sent by air.3、表语从句 e.g. My advice is that you should try it again.4、目的状语从句（p.274） e.g. You must get up earlier in case/for fear that/lest you should be late for school.l suggest/insiste.g. I suggest he should do i

9、t at once. His pale face suggested that he was ill. I insisted what I said was right. He insisted that I should follow his instructions.三、几个常用需退格的句型1、Its time sb. +did sth. （p.272）e.g. Its time you went to school.2、Sb. would rather sb. Did(had done) sth. （p.272） e.g. I would rather you came tomorrow.I would rather you hadnt heard the news yesterday. 3、wish + sb did sth. （p.272）had done sth.would/could do sth. e.g. I wish I were you./ I wish I had wings like birds.I wish he had come to see me last night.I wish I would fly to the moon.4、as if/as though （p.272） e.g. It seems