英语高考语法解析课件：第7节 情态动词和虚拟语气.ppt

1、英语高考语法解析第七节 情态动词和虚拟语气情态动词have done用法must have done一定做过某事，其否定形式为cant/couldnt have donecan/could have done1.本来能够做但却未做2.可能做过某事cant/couldnt have done不可能做过某事may/might have done或许/可能做过某事should/ought to have done本该做但却未做，其否定形式表示本不该做但却做了neednt have done做了本没有必要做的事情if条件从句从句的谓语形式主句的谓语形式表示现在情况动词过去式(be的过去式用were)s

2、hould/would/could/might动词原形表示过去情况had过去分词should/would/could/mighthave过去分词表示未来情况should动词原形should/would/could/might动词原形动词过去式were to动词原形if省略句如果虚拟条件句中含有were/had/should，可把if省略，把were/had/should提到主语之前形成倒装，若为否定形式，not不可提前。混合条件句有时条件句的动作与主句动作发生的时间不一致，这时动词的形式应根据它们各自表示的时间加以调整。含蓄条件句有时假设的情况不用条件从句表达，而是用but for，witho

3、ut等介词(短语)或上下文来表示条件。用连词otherwise，or等暗示后文与前面的情况相反，从而引出后文的虚拟语气。虚拟条件通过but暗示出来，模式为“虚拟情况but真实情况”。与现在事实相反从句用一般过去时与过去事实相反从句用过去完成时与将来事实相反从句用would动词原形针对训练.用适当的情态动词填空1_I have a word with you?It wont take long.【答案】Can2Although you _ find bargains in London，its not generally a cheap place to shop.【答案】can3Ive pre

4、pared all kinds of food for the picnic.Do you mean we _ bring anything with us?【答案】neednt4It was sad to me that they，so poor themselves，_ bring me food.【答案】should5Life is unpredictable；even the poorest _ become the richest.【答案】might6I still remember my happy childhood when my mother _ take me to Dis

5、neyland at weekends.【答案】would7Ive ordered some pizza，so we _ worry about cooking when we get home tired.【答案】neednt8Since nobody gave him any help，he _ have done the research on his own.【答案】must9Why are your eyes so red?You _ have slept well last night.Yeah，I stayed up late writing a report.【答案】cant1

6、0My mom suggests that we _ eat out for a change this weekend.【答案】should.用所给动词的适当形式填空1_(be)there no modern telecommunications，we would have to wait for weeks to get news from around the world.【答案】Were2 If Mr Dewey _(be)present，he would have offered any possible assistance to the people there.【答案】had

7、been3We would rather our daughter _(stay)at home with us，but it is her choice，and she is not a child any longer.【答案】stayed4If he _(catch)the morning train，he would not have been late for the meeting.【答案】had caught5They were abroad during the months when we were carrying out the investigation，or they

8、 _(come)to our help.【答案】would have come6It was John who broke the window.Why are you talking to me as if I _(do)it?【答案】had done7We _(be)back in the hotel now if you didnt lose the map.【答案】would be8Where are the children?The dinners going to be completely ruined.I wish they _(not be)always late.【答案】werent9He insisted he _(send)to the city.【答案】(should)be sent10His expression suggested that he _(pass)the test.【答案】had passed