if引导条件状语从句的课件.pptx

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1、1.真实条件句真实条件句表示的情况有可能发生，用陈述语气。表示的情况有可能发生，用陈述语气。I will not go to the party if I am not invited.2.虚拟条件句虚拟条件句表示的情况表示的情况不可能发生或者发生的可能很不可能发生或者发生的可能很小。小。下面我们重点讲虚拟条件句下面我们重点讲虚拟条件句时间时间从句从句主句主句与与现在现在事实相反事实相反过去式过去式（be 一般用一般用were）should would could +动词原形动词原形 might与与过去过去事实相反事实相反 had+过去分词过去分词 should would could +ha

2、ve+过分过分 might与与将来将来事实相反事实相反过去式（过去式（be 一般用一般用were）should+动词原形动词原形 were to+动词原形动词原形 should would could +动词原形动词原形 might1.与现在现在事实相反If I knew his telephone number,I would tell you.If I were you,I would not so proud.2.与过去过去事实相反1.If he had taken my advice,he would not have made such a mistake.2.If I had go

3、t there earlier,I would have met her.3.与将来将来的事实相反1.If there were a heavy snow next Sunday,we would not go skating.2.If she should come,I would tell her about the matter.1.If my brother were here,everything would be all right.2.If you had worked hard,you would have passed the exam.3.If it should rain

4、 tomorrow,we would not go camping.如果条件从句中有如果条件从句中有were/had/should时，可以时，可以把把if省略省略，把这几个词放到主句之前，构成，把这几个词放到主句之前，构成主主谓倒装谓倒装。Were I you(=If I were you),I would not do it.Had I the time(=If I had the time),I would go.Should you change your mind(=If you should change your mind),no one would blame you.当条件状语

5、从句表示的行为所发生的时间和主当条件状语从句表示的行为所发生的时间和主句表示的行为所发生的时间句表示的行为所发生的时间不一致时不一致时，被称为，被称为“错综时间条件句错综时间条件句”，动词的形式要根据它所，动词的形式要根据它所表示的时间作相应的调整。表示的时间作相应的调整。uIf you had followed my advice,you would be better now.uIf you had not studied the problem carefully,you would find difficulty now.1.The printer is of good quality

6、.If it _break down within the first year,we would repair it at our expense.A.would B.shouldC.couldD.might2._,the forest fire would have been discovered much earlier.A.But for their careB.If they were careful C.Without their careD.Had they been more careful3.If the present unemployment_ continue,the

7、society would face a more difficult situation.A.wouldB.shouldC.mightD.could4.The weather has been very hot and dry.Yes.If it had rained even a drop,things would be much better now!And my vegetables_.A.wouldnt dieB.didnt dieC.hadnt diedD.wouldnt have died5.Had I known about the computer program,a hug

8、e amount of time and energy_.A.would have been savedB.had been savedC.will be savedD.was saved6.If we _ the other road,we might have arrived here in time for the meeting.A.takeB.had takenC.tookD.have taken 含蓄虚拟条件句含蓄虚拟条件句without（没有（没有),if only（要是（要是就就是好了），是好了），but for(要不是要不是)，otherwise，等等，等等pWithout your help,we couldnt have finished the work ahead of time.pIf only I could speak several languages.pBut for the meeting,I would have gone home at six.lHe hesitated for a moment before kicking the ball,otherwise he _the goal.A.had scoredB.scoredC.would scoreD.would have scored