英语中六大从句用法总结 1.主语从句 作形式主语，而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 将从句放在句末。常见的句型有： *It is a fact\a pity\a question\good news that... *It seems\appears\happened\has turned out that... *It is clear\important\likely\possible that... *It is said\reported\estimated\has been proved that... It is said that comic books create a connection between people of the same generation. It seems that the performance is very useful.
作形式主语。 引导的主语从句表示“...的东西时”，一般不用it2)what What we lack is experience. 都用陈述等词含有各自的疑问意义，但它们引导的主语从句，3)what,who,when,why,whether 语序。 How the plan is to be carried out should be discussed again. I did know why I felt like crying.
2.宾语从句常可省略。介词后一般接疑）宾语从句可位于及物动词、介词和某些形容词后。连词that1只是）已构成固定搭配，其他),but that(因为),except that(除了问词引导的宾语从句。in that( 引导的宾语从句。 介词后一般不接that *I promised that I would change the situation. *All this is different from what American young people 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.
it2)宾语从句后如有宾补，要用形式宾语来代替，而把宾语从句移至宾补之后。 He has made it clear that he would not change his mind.
一般将否定词如果谓语是否定的，在think,believe,suppose,expect等动词后的宾语从句中，3) 移至主句谓语上，宾语从句则变成肯定形式。 He didn't think that the money was well spent.
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. Perhaps 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.
4.同位语从句由于先行名词的意引导，一般用连词that同位语从句用于对前面出现的名词作进一步说明，有名词见常的先行，也可用whether,who,when,where,what,why,how等引导。义不同由有时fact,idea,belief,news,hope,conclusion,evidence,suggestion,order,problem,report,decision. 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 books I could borrow at a time. The news came that their team had won the championship. 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 computers 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 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 I've heard from him.
He's the first person that I'm going to interview this afternoon. 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 (which\that) we have to put up with. 等。关系副词在从句中作状语，意义上相当when,where,why3)引导定语从句的关系副词有 于一个“介词+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. 定语从句 5. 非限制性定语从句 *与主句之间有逗也可修饰整个主句，起补充说明作用，非限制性定语从句既可修饰先行词， that引导非限制性定语从句。关系词不可省略。号隔开，若省去，原句意思不受影响。不可用 Every object has a gravitational pull,which is rather like magnetism.
“介词+which\whom\whose”引导的定语从句*”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+which\whom\whose“介词 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 savings
It is written by a person with whom we are all familiar. 引导的定语从句 *as”的结构中，代替先行词是人或物”及“the same...asas引导的定语从句主要用于“such...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。 的名词。as problems) These are not such problems as can be easily solved.(as代替先行词 As is mentioned above,no single company or group can control 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...than,each(every) time,the moment,immediately(that)等。 As soon as I sent an e-mail message,I received positive responses. The moment he heard the good news,he jumped with joy.
地点状语从句* where,wherever. 引导地点状语从句的连词是 Wherever she went,she took her little daughter with her.
