it作非人称代词的用法

来源于未知   雪域流沙发布   2020-07-18 09:18更新  浏览

it作非人称代词的用法

it 作非人称代词句型是“it is”,主要用于指时间、距离、价值、天气、气候及温度等自然现象。

1. 基本用法

it 作非人称代词的用法,主要用于指时间、距离、价值、天气、气候及温度等自然现象。如:

It is time for the meeting. 开会的时间到了。(指代时间) 

What time is it? It's twelve o'clock.
“现 在几点了?”“十二点钟。”(指代时间) 

It’s already 12 o’clock. 已是12点了。(指代时间) 

It's about 50 kilometers from here to my ranch.
从这儿到我的牧场约有五十公里.(指代距离) 

It is 1,500 kilometers from Beijing to Guangzhou.
从北京到广州有1500公里。(指代距离)

It’s too late to go there now.(指代时间)
现在去那儿已经太迟了。

It rained all day yesterday.(指代天气)
昨天下了一整天的雨。

It can get very hot here.(指代自然现象)
这里有时会很热。

2. 用于某些句型

● It’s time for sth. 该做某事了。
● It’s time to do sth. 该做某事的时候了。
● It’s time for sb to do sth. 某人该干某事了。
● It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式,有时也用“should+动词原形”)
● It was (about / high) time + that-从句.(从句谓语动词用过去完成式)
● It’s the first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
● It was the first (second) time + that-从句.(从句谓语用现在完成时)
It’s + 时间段 + since-从句. 自从……有一段时间了。
It’s + 时间段 + before-从句. 过多长的时间才……

五种It is ---结构句型讲解

1.It is / was+bai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du觉。(一定要注意zhi被强调句型谓语动词否定的转移,及形dao式)。

2.It 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。

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

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

4.It 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。

5.It 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.
他直到电影结束才回来。他没有看到这部电影真可惜。

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