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1、.今天起为大家介绍一下英语中几大从句的用法以及其相关内容，如果总结地不够详尽的，还请各位朋友补充说明，谢谢。1.主语从句1）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
2、 said that comic books create a connection between people of the same generation.It seems that the performance is very useful.2)what 引导的主语从句表示“ .的东西时 ”，一般不用it 作形式主语。What we lack is experience.3)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 disc
3、ussed again.I did know why I felt like crying.To be continued:宾语从2.宾语从句1）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 peopl
4、e would say about friendship.*He is certain that watching so much television is not good for children.*This article is well-written except that it is a bit too long.2) 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 his mind.3) 在 think,believe,suppose,expect 等动词后的宾语
5、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.To be continued:表语从句3.表语从句表 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.Per
6、haps the most important thing to remember is that there is no one common type of life.in America.The reason why so many people died there is that there were not enough food supplies.It looks as if successful international cultural communication will make the world smaller.To be continued:同位语从句4.同位语从
7、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,where,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 join the fashion show.I had no idea how many bo
8、oks I could borrow at a time.The news came that their team had won the championship.To be continued:定语从句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
9、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 computers and cables which make up the Internet are owned by people and organiz ations.Those who live alone or who are sick may have trouble in getting close to other people.The girl
10、whose parents died in an accident is living with her grandmother.1) 当 先 行 词 是all,anything,everything,something,nothing等 不 定 代 词 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 this afterno
11、on.2) 关系代词的省略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 those things with which we have to put up.This is one of those things (whichthat) we have to put 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
12、词 +which”的结构。Even in comic books where(=in which) there are no words,the stories are fully expressed through the drawings.No one knows the reason why(=for which) he was so angry that day.5.定语从句*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
13、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 is the computer on which he spent all his savingsIt is written by a person with whom we are all familiar.*as 引导的定语从句as 引导的定语从句主要用于“ such.as 及”“ thesame
14、.as”的结构中，代替先行词是人或物的名词。 as 引导非限制性定语从句时，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,no single company or group can control what happens on the Inte rnet.(as 代替主语 )To be continued:状语从句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,
15、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.than,each(every) time,the moment,imm ediately(that) 等。As soon as I sent an e-mail message,I received positive responses.The moment he heard the good news,h
16、e jumped with joy.*地点状语从句引导地点状语从句的连词是where,wherever.Wherever she went,she took her little daughter with her.*原因、结果和目的状语从句1 ） 引导原因状 语从句的从 属连词有：because,as,since,now(that),seeing that,considering that,in that等。Considering that he is a freshman,we must say he is doing well.2) 引导结果状语从句的连词有：so.that,such.t
17、hat,so that,that,so等。Mickey Mouse is so attractive that the children are reluctant to leave.3) 引导目的状语从句的连词有：so that,in order that,for fear that,lest等，从句常使用may,might,can,could,would等情态动词。We got up early this morning so that we could catch the first bus to the railway station.*条件和让步状语从句1 ） 引导条件状 语从句的连
18、 词和词组有if,unless,as(so) long as,on condition that,in case,provided(providing) that,supposing等。As long as you have the right equipment,you can use a telephone line to transmit computer data.2)引导让步状语从句的连词和词组有though,although,whether,even though,even if,no matter what(when,how.),whatever(whenever,whereve
19、r,however.)等。 though,even if等引导状语从句可转换成含有as 的部分倒装结构，具有强调意义。其结构为“形容词（副词、动词、名词）+as+ 主语 +谓语 ”。No matter what you may say,I would not change my mind.Young as he is,he is quite experienced in this work.(=though he is young)Child as he is,he can speak English fluently.(=though he is a child)*方式状语从句引导方式状语从句的连词有as,just as,as if,as though等。 as if,as though引导的状语从句中，谓语动词常用虚拟语气，表示与事实相反。The young man made the experiment just as the teacher had taught him.Everything went on as usual as if nothing had happened.