英语从句讲解

Simple sentence

Compound sentence

Complex sentence

从句：名词性从句（主语从句，宾语从句，表语从句，同位语从句）

形容词性从句（定语从句）

副词性从句（状语从句）

英语中六大从句用法总结

在句子中起名词作用的各种从句，统称为名词性从句

1.主语从句subjective clause

一般由what, who, which, why, how, when, which, whether •- or等引导，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 self-evident that …很明显的是

It goes without saying that …不用说

It is asserted that...有人主张……

It is believed that ... 据信……

It is generally considered that...人们普遍认为

It is hoped that...人们希望……

It is reported that...据报道……

It is said that...据说……It is supposed that...据推测...

众所周知……

It is well-known that ...

It must be admitted that... 必须承认...

It cannot be denied that …不可否认...

It must be pointed out that... 需指出的是••…

It was told that ... 据传...

It will be said that ... 有人会说...

It follows that …由此可见

It is inappropriate that ............... 是不合适的

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 discussed again.

I did know why I felt like crying.

2.宾语从句objective clause

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。

*1 promised that I would change the situation.

*AII 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. Compliment

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.

2.表语从句Predictive clause

Linking verb

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appositional clause

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,suggestio

n,order,problem,report,decision. 有时由于谓语较短，将同位