1、他说他还要再借一本.他告诉我他回来并会准时来他告诉我他回来并会准时来He told me（that）he would come and that he would come on time.当当whether后紧跟后紧跟or/or not时时,不用不用if.I dont know whether I will stay or not.介词介词后面的宾语从句不能用后面的宾语从句不能用if.I worry about whether I hurt her feelings.1.whether和和if都可以引导宾语从句都可以引导宾语从句It is3.表语从句在句中作表语的句子叫表语从句。引导表语从句
2、的关联词与引导主语从句的关联词大致一样，表语从句位于连系动词后，有时用as if,because 引导。其基本结构为：主语+系动词+that从句 事实是我们输了比赛事实是我们输了比赛The fact is that we have lost the game.那就是我想要的那就是我想要的Thats just what I want.这就是我们的问题所在这就是我们的问题所在This is where our problem lies.那就是他为啥没来开会那就是他为啥没来开会That is why he didnt come to the meeting.这是因为他没赶上火车This is bec
3、ause he missed the train 当主语为当主语为it,that,this时时,because 可以引导可以引导句子句子,出现在表语的位置上出现在表语的位置上.否则否则,because应引导原因状语从句应引导原因状语从句.这是因为我们夏天离太阳近这是因为我们夏天离太阳近It is because we are closer to the sun in summer.这是因为他违法了这是因为他违法了This is because he broke the law.他来晚的原因是他差一分钟没赶上火车他来晚的原因是他差一分钟没赶上火车The reason why he was lat
4、e was that he missed the train by one minute this morning.需要注意的是，当主语是reason 时，表语从句要用that引导而不是because。他缺席的原因是前天睡的太晚早晨没起来他缺席的原因是前天睡的太晚早晨没起来The reason of his absence is that he stayed up too late the night before and could not get up that morning.看起来好像要下雨It looks as if it is going to rain1.Two thirds o
5、f all girls in Britain are on a diet./The fact worries their parents and teachers a lot.2.The Queen of England was on a three-day visit in China./We heard the news last night._ The fact that two thirds of all girls are on a diet worries their parents and teachers a lot._We heard the news last night
6、that the Queen of England was on a three-day visit in China.4.Time travel is possible./There is no scientific proof for the idea.5.Chinese students should be given more free time./The suggestion is welcomed by many people,especially kids in school.3.Teenagers should not spend too much time online./M
7、any British parents hold the view._Many British parents hold the view that teenagers shouldnt spend too much time online._There is no scientific proof for the idea that time travel is possible._The suggestion that Chinese students should be given more free time is welcomed by many people,especially
8、kids in school.我不知道她什么时候回来 I have no idea when she will be back.同位语从句和定语从句的区别：that作为关系代词，可以引导定语从句，充当句子成分，在从句中作宾语时可以省略；that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。I had no idea that you were here.Have you got the idea（that）this book gives you of life in ancient Greece？(that引导同位语从句,不能省略）(that引导定语从句，作宾语，
9、可以省略）(3)引导的宾语从句放在句首时，引导的宾语从句放在句首时，用用whether,不用不用if Whether he has stolen the money,I dont know.Whether和和if引导的宾语从句时，二引导的宾语从句时，二者常可互换。者常可互换。I dont know if/whether you are satisfied with your work.引导否定的宾语从句时，通常用引导否定的宾语从句时，通常用if 不用不用whether I dont care if it doesnt rain.注意注意doubt用于肯定结构时，后面用whether/if 引导
10、名词性从句；用于否定结构或疑问结构时，后面用 that 引导名词性从句。be sure 用于肯定句或疑问句时，后接 that 引导的名词性从句；用于否定句时，后接whether/if 引导的名词性从句。I dont doubt(that)you will succeed.I dont know whether/if he will come tonight.I doubt if/whether you will keep your promise.1.The photographs will show you _（MET1989）A.what does our village look lik
11、e B.what our village looks like C.how does our village look like D.how our village looks like 2.考查引导词that与what的区别高考题例示：1._we cant get seems better than _we have.(NMET1996)A.What;what B.What;that C.That;that D.That;what2.No one can be sure _ in a million years.(MET1991)A.what man will look like B.wha
12、t will man look like C.man will look like what D.what look will man like 3.考查it在名词性从句中作形式主语或形式宾语的用法高考题例示：1._ is a fact that English is being accepted as an international language.(NMET1995)A.There B.This C.That D.It6.考查名词性从句的虚拟语气问题高考题例示：1.It is necessary that a college student _at least a foreign language.(上海1993)A.masters B.should master C.mastered D.will master
