强调句型和it的用法

强调句型

It is (was) +被强调部分+ that (who)+ 句子其他部分。

1.It is + 被强调部分+ that ...

该句型是强调句型。将被强调的部分放在前面，其它部分置于that之后，被强调部分可以是主语，宾语，表语或状语，强调的主语如果是人，that可以由who换用。如果把这种句型结构划掉后，应该是一个完整无缺的句子；这也是判断强调句型与其它从句的方法。

It was they that (who) cleaned the classroom yesterday. It was in the street that I met her father.

2. It is not until + 被强调部分+ that ...

该句型也是强调句型。主要用于强凋时间状语，译成汉语“直到…才…＂，可以说是not ... until ... 的强调形式。

It was not until she took off her dark glasses that I realized shewas a famous film star.

= Not until she took off her dark glasses did I realize she was

= I didn’t realize she was a famous film star until she took off

3. 强调句型的句式变换

1）强调句型的一般疑问句形式

句式特征：Is/ Was it +被强调部分+ that…

2）结合特殊疑问词构成特殊疑问句形式

句式特征：特殊疑问词+is/was it that…？

•例句：

•How is it that she turned down our help? 什么原因使得…？

•Where was it that you met Tom yesterday? 究竟在哪…？

•When was it that you met him in the park? 究竟何时…？

•When and where was it that you got to know Mary? 究竟在何时何地…？

•Who was it that that came up with the bright idea? 究竟是谁…？

•Which book is it that you want to buy? 究竟是哪一本书…？

•Whose umbrella was it that you took away? 到底是谁的伞…？

3）在强调句型中考察主谓一致与比较结构。

在强调句型中，有时也考察用rather than，not …but…等连接的平行对比结构，此时既要注重比较结构，又要注意主谓一致，属于较复杂的句式。

句式特征为：It is/was not…but…that… ; 不是…而是…（that后的动词与but后的名词或代词保持一致）

It is /was … not … that… ; 或者：It is/was…that… not …;

是…而不是…（that后的动词应与not前的名词或代词保持一致）

It is/was … rather than… that… ;

是…而不是… ( that后的动词应与rather than前的名词或代词保持一致)

4）强调句型的形近句型

(1) It be +被强调部分+that+… 是强调句型。去掉it，be，that后，剩余部分

仍能组成一个完整的句子。如：

It is probably due to these skills that they have been offered a wide variety of positions. 本句去掉it，be，that后可转化成：Probably due to these skills they have been offered a wide variety of positions.

(2) It+ be+ adj. / n. / 过去分词+that从句句型。该句型中的It是形式主语，

that引导的从句是真正的主语从句。如：

•It is important that he (should) learn English well.

•It is a fact that he can speak both English and Japanese.

•It is suggested that he leave his office right now.

(3) “It be +时间段+since……”句型。如果since和延续性动词连用，则意为“某

人不做某事已有多久了”；如和短暂动词连用，则为“某人做某事已有多久了”。如：•It is two months since he fell ill. 他病了两个月了。

•It is two months since he was ill. 他病好已经两个月了。

（4）It be+时间段+before……句型表示“……多久后某事发生”。

•It was a long time before they met again. 很长时间后他们才见面。

•It was not long before he came back. 时间过不久他们就回来了。

（5）“It be…when……”句型表示“某事发生时正是……时候”

•It was 1949 when the PRC was founded. 试比较强调句型句：

•It was in 1949 that the PRC was founded. (去掉it，was，that后仍是一个完整的句子)

It 的用法

一、代词it

1.用作人称代词代替上文提到过的人或事物，（有时不特指某件事物，而代表前面已提到的或者将会发生的某件事情，或者是谈话双方都明白的情况，如前面第2题）

2. 用作指示代词，（起着this 或that 的作用）指一个人或一件事情。

-- what is this?

-- It’s a telephone.

-- who’s on the telephone?

-- It’s Lily.

3. 指时间、距离、价值、天气和自然现象等。

It is cold today , isn’t it?

It is about an hour’s ride to the park.

二、引导词it

1.It 常作形式主语，把真正的主语置于句后，真正的主语通常为不定式、动名

词、主语从句。

It is easy to buy a new radio.

It is no use telling him that.

It is strange that nobody knows her