2020届二轮复习语法专项名词性从句学案

专题9名词性从句

必备知识梳理

考点一主语从句：

一．引导主语从句的连接词：

从属连词that、whether、迁;连接代词what、who、whom、whose、whatever、whichever、

whoever等；连接副词when、where、why、how、whenever等。

That they were in truth sisters was clear from the facial similarity between them.

What struck me most in the movie was the father’s deep love for his son.

二．it作形式主语的主语从句：

主语从句一般放在句首，但有时也可用it作形式主语，而将主语从句移到句子的末尾。常见的句型：

(1)It+be+形容词( necessary/likely// important/ uncertain等)+主语从句

(2)It+be+名词(短语)( a pity/ no wonder/ no surprise等)+主语从句

(3)It+be+过去分词(said/ reported/ decided/ believed等)+主语从句

(4)1t+不及物动词( seems/ appears/ happens等)+主语从句

It is uncertain what side effect the medicine will bring aboutalthough about two

thousand patients have taken it.

It’s no surprise that our team has won the game.

It is decided that the meeting will be put off till next Monday.

考点二宾语从句：

一．引导宾语从句的连接词

从属连词that、whether、if；连接代词what、who、whose、whatever、whichever、

whoever等；连接副词when、where、why、how等。从句用陈述句语序。

(2016浙江卷阅读七选五) Nobody entering a university knows exactly what they

want to study.

We promise whoever attends the party a chance to have a photo taken with the movie

star.

(2017天津卷完形填空) I came to believe that I could do nothing about my weight.

In order to make a change, you need to decide why it’s important.

二．it作形式宾语的宾语从句

(1)一些动词后的宾语从句有宾语补足语时，则需要用让作形式宾语，而将that引

导的宾语从句后置。常见的这类动词有find、feel，think、consider、believe、

guess，suppose、make等。

He has made it clear that the meeting will not be postponed.

(2)动词hate、like、dislike、appreciate、enjoy等表示“喜欢”“厌恶”时以及动词

短语see to、depend on、rely on等常用it作形式宾语，而将宾语从句后置。

I shall see to it that he is taken good care of when you are absent.

考点三表语从句：

一．引导表语从句的连接词

从属连词that、whether；连接代词what、who、whose、whatever、whichever、

whoever等；连接副词when、where、why、how等。从句用陈述句语序。

I’d like to start my own business---that’s what I’d do if I had the money.

二．as if/as though引导的表语从句

as if/ as though引导的表语从句常跟在be动词，seem、look、taste、sound、feel、

appear等系动词之后。

The thick smog covered the whole city. It was as if a great black blanket had been

thrown over it.

三．because、why引导的表语从句

because，why也可引导表语从句，但because引导的表语从句主语不能是reason

或cause(该结构常用that引导)。常用于以下句型

This/ That is/ was why…这/那是……的原因

This/ That is/ was because…这/那是因为……

The reason why.is/ was that…的原因是……

From space, the earth looks blue. This is because about seventy one percent of its

surface is covered by water.

The reason why he didn’t pass the exam was that he was toocareless.

考点四同位语从句：

一.引导同位语从句的连接词

同位语从句通常用that引导，that无词义也不作成分，但是不能省略，从句用陈述语序。同位语从句还可用whether、when、where、why、how等引导。

He stood by his belief that the problem wasn’t serious.

I’ve no idea where his birthday party will be held.

二．接同位语从句常见的名词

接同位语从句的常见名词:fact、news、idea、truth、hope、problem、information、belief、thought、doubt、promise、question等。

He broke his promise that he shall buy me a gift.

He started the project with the thought that they would help him.

三．分隔式同位语从句

分隔式同位语从句。有时同位语从句的谓语较短，而从句内容较长，这时为避免“头重脚轻”，常常将谓语提到从句前面，形成分隔式同位语从句。

The news came that the mayor would come to visit our school.