英文例句 it引导的形式主语大神们帮帮忙

同位语从句用来做限定性定语修饰代词 it 的现象十分少见，这是因为 it 通常用以指代前面已经提到过的事物。而作为解释性的同位语从句恰恰是用来解释或说明一个首次提及的事物，因而从逻辑上说，人们不会用同位语从句来修饰 it。但是，用同位语从句作为非限定性定语从句（即从句和先行词之间用逗号隔开）修饰 it 还是有的：

I've been teaching the course "cross-culture understanding" for two years Students love it, which they have an opportunity of looking into folklore in the United States

1It is / was＋被强调的部分＋that(who)+剩余的部分如：

It wasn’t until he came back that I went to bed直到他回来我才睡觉。(一定要注意被强调句型谓语动词否定的转移，及形式)。

It was because he was ill that he didn’t come to school today只因为他有病了今天没有来上学。（只能用because而不能用for, as 或since）

It is I who am a student 我确实是个学生。（句中am不能用are来代替。）

2It is high time (time/ about time) (that) 主语＋should do / did+其它。（注意从句中的谓语动词用的是虚拟语气）

It is high time that we should go / went home我们该回家了。

3It is / was said ( reported…)＋that+从句 如：

It was said that he had read this novel据说他读过这篇小说。＝He was said to have read this novel

4It is impossible / necessary/ strange…that clause(从句中的谓语用should＋do / should have done，其形式是虚拟语气。)如：

It is strange that he should have failed in this exam真奇怪，他这次考试没有及格。

5It is + a pity/ a shame…that clause(注意从句中的谓语动词用should do或should have done的形式，但should可以省略。)如：

He didn’t come back until the film ended It was a pity that he should have missed this film 他直到**结束才回来。他没有看到这部**真可惜。

6It is suggested / ordered/ commanded /…that +clause(从句的谓语动词用should do, 但should可以省略。)如：

It is suggested that the meeting should be put off有人建议推迟会议。

7It is/was＋表示地点的名词＋where+从句。（注意本句不是强调句型，而是以where引导的定语从句。）如：

It was this house where I was born请比较：It was in this house that I was born (后一句是强调句型。)

8It is / was +表示时间的名词＋when+从句。（注意本句型也不是强调句型，而是以when引导的定语从句。）如：

It was 1999 when he came back from the United States 请比较：It was in 1999 that he came back from the United States

9It is well-known that＋从句。如：

It is well-known that she is a learned woman

10It is +段时间＋since+主语＋did 请比较：

It was +段时间＋since+主语＋had done 如：

It is five years since he left here他已经离开这儿五年了。

It was five years since he left here（同上）

11It is +形容词＋for+ sb+ to do 如：

It is impossible for me to finish this work before tomorrow我明天之前完成此工作是不可能的。

It is +（心理品质方面的）形容词＋of + sb + to do = 主语+ be +形容词＋to do(常用的形容词有：kind, stupid; foolish, good, wise等。)如：

It is kind of you to help me＝You are kind to help me你真好给我提供了帮助。

12It is／was not until…that

1It is very important to keep our environment clean and tidy这句中it做形式主语,真正的主语是"to keep our environment clean and tidy"这个动词不定式2It is the person who you want to look forIt强调句做形式主语

强调句可以强调句子中除谓语外的任何部分,并且去掉(It+was/is+who/whom/that)这个结构后句子仍能成立

例:All

the

members

held

a

meeting

in

the

club

yesterday

（强调all

the

members）

It

was

all

the

members

that

held

a

meeting

in

the

club

yesterday

（强调a

meeting

）It

was

a

meeting

that

all

the

members

held

in

the

club

yesterday

（强调in

the

club

）It

was

in

the

club

that

all

the

members

held

a

meeting

yesterday

（强调yesterday）It

was

yesterday

that

all

the

members

held

a

meeting

in

the

club

It

作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人是也可用who/whom。主语从句：It

is

+形容词/名词/某些动词ed

+

that

从句

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