英语中几大从句的用法总结

英语中几大从句的用法总结

⒈主语从句

⑴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 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 bet

ween people of the

same generation.

*It seems that the performance is very useful.

⑵what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.

⑶what,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 discus

sed again.

*I did know why I felt like crying.

⒉宾语从句

⑴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 peo

ple

would say about friendship.

*He is certain that watching so much television is n

ot

good for children.

*This article is well-written except that it is a bit

too long.

⑵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.

⑶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 didn't think that the money was well spent.

⒊表语从句

⑴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 t

hat

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.

⑵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.

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/

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 joi

n

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】

⑴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 tro uble in getting close to other people.