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1、英语中几大从句的用法总结主语从句主语从句可直接位于主语的位置，如果从句较长， 谓语又较短，可用it作形式主语，而将从句放在句末。常见的句型有：*It is a facta pitya questiongood news that.*It seemsappearshappenedhas turned out that.*It is clearimportantlikelypossible that.*It is saidreportedestimatedhas been proved that.*It is said that comic books create a connection be
2、tween people of the same generation.*It seems that the performance is very useful. what引导的主语从句表示“.的.作形式主语。东西时 ”，一般不用it*What we lack is experience. what,who,when,why,whether等词含有各自的疑问意义，但它们引导的主语从句，都用陈述语序。*How the plan is to be carried out should be discussed again.*I did know why I felt like crying.宾语
3、从句宾语从句可位于及物动词、介词和某些形容词后。连词 that常可省略。介词后一般接疑问词引导的宾语从句。in that(因为 ),except that(除了 ),but that(只是） 已构成固定搭配，其他介词后一般不接that引导的宾语从句。*I promised that I would change the situation.*All this is different from what American young peoplewould say about friendship.*He is certain that watching so much television
4、is notgood for children.*This article is well-written except that it is a bittoo long.宾语从句后如有宾补，要用形式宾语it来代替，而把宾语从句移至宾补之后。*He has made it clear that he would not change hismind.在 think,believe,suppose,expect等动词后的宾语从句中，如果谓语是否定的，一般将否定词移至主句谓语上，宾语从句则变成肯定形式。*He didnt think that the money was well spent.表语
5、从句表语从句出现在结构为“主语 +系动词 +表语从句 ”的句子中。 表语从句除可用that,what,when,why,whether,how等引导外，还可由because,as if(though)等引导。 that常可省略。如主句主语为reason,只能用 that引导表语从句， 不可用 because.*Perhaps the most important thing to remember is thatthere is no one common type of life in America.*The reason why so many people died there is
6、that there were not enough food supplies.*It looks as if successful international culturalcommunication will make the world smaller.宾语从句后如有宾补，要用形式宾语it来代替，而把宾语从句移至宾补之后。*He has made it clear that he would not change hismind.4. 同位语从句同位语从句用于对前面出现的名词作进一步说明，一般用连词 that引导，由于先行名词的意义不同，也可用whether/who/when/Whe
7、re/what/why/how等引导。常见的先行名词有fact/idea/Belief/news/hope/conclusion/evidence/suggestion/order/Problem/report,/decision.有时由于谓语较短，将同位语从句位于谓语之后。*She finally made the decision that she would jointhe fashion show.*I had no idea how many books I could borrow at atime.*The news came that their team had won th
8、echampionship.5. 定语从句【定语从句所修饰的先行词可以是名词或代词，也可以是一个句子。定语从句通常位于先行词之后，由关系代词或关系副词引导】限制性定语从句【限制性定语从句修饰先行词，对先行词起修饰作用，紧接先行词之后，无逗号，若省去，原句意思不完整。引导定语从句的关系代词有who/whom/whose/which/that等 who/whom/whose用于指人， whose有时也可指物，相当于 of which；which用于指物； that既可指人也可指物，但只用于限制性定语从句中。关系代词除了引导定语从句，替代先行词外，还在从句中担任主语、宾语、定语等】*The comp
9、uters and cables which make up the Internet are owned by people and organizations.*Those who live alone or who are sick may have trouble in getting close to other people.*The girl whose parents died in an accident is livin g with her grandmother.1) 当先行词是all/anything/everything/something/nothing等不定代词
10、或先行词前有first/last/any/few/much/some/no/only以及形容词最高级修饰时，只能用关系代词that引导从句。*That is all that Ive heard from him.*Hes the first person that Im going to interview thisafternoon.2) 在从句中作宾语的关系代词常可省略。关系代词紧跟介词，作介词宾语时不可用that ，只可用which或 whom引导从句，并且不可省略，但当介词位于宾语从句句末时， 作为介词宾语的关系代词仍可用that ，也可省略。*This is one of thos
11、e things with which we have toputup.*This is one of those things (whichthat) we have toput up with.3) 引导定语从句的关系副词有when/where/why等。关系副词在从句中作状语，意义上相当于一个“介词 +which”的结构。*Even in comic books where(=in which) there are n o words,the stories are fully expressed through the drawings.*No one knows the reason
12、 why(=for which) he wasso angry that day.非限制性定语从句【非限制性定语从句既可修饰先行词，也可修饰整个主句，起补充说明作用，与主句之间有逗号隔开， 若省去， 原句意思不受影响。不可用 that引导非限制性定语从句。关系词不可省略】*Every object has a gravitational pull,which is rather like magnetism. “ 介词whose” 引导的定语从句【“介词whose” 可引导限制性定语从句，也可引导非限制性定语从句，该结构中介词的选择取决于从句谓语动词的固定搭配，或先行词的习惯搭配】*This
13、is the computer on which he spent all hissavings*It is written by a person with whom we are allfamiliar. as引导的定语从句【as 引导的定语从句主要用于“such.as”及“ thesame.as”的结构中，代替先行词是人或物的名词。as引导非限制性定语句时，代替整个主句， 从句可位于主句之前、之后或中间】*These are not such problems as can be easily solved.(as代替先行词problems)*As is mentioned above,
14、no single company or group canControl what happens on the Internet.(as代替主语 )6. 状语从句时间状语从句引导时间状语从句的从属连词和词组有：1 ） when/whenever/while/as/after/before/since/till/until/once 等。*We have learnt quite a lot about it since we came here.2) as soon as/hardly(scarcely).when/no sooner.th an/each(every) time/the moment/immediately(that)等。*As soon as I sent an e-mail message,I receivedpositive responses.*The moment he heard the good news,he jumpe d with joy.地点状语从句引导地点状语从句的连词是where,wherever.*Wherever she we
