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初中it用法练习题
初中 it 用法练习题在英语中,it 有许多不同的用法,它既可以用作代词，也可以用作引导词，还可以用来构成强调句型。
1. it 用作代词用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且 it 指特定的事物；如果指前文中提到的事物中的任何一个，用 one。
one 可以与 any, each, every, not 等连用，但 one 不可代替不可数名词。
Wheres your car? Its in the garage. 你的汽车在哪儿呢？在车库里。
Did you hit it? 你打中了吗？ The baby cried when it was hungry.这婴儿饿时就哭。
Who is that? Its me. 是谁？我。
Whats this? Its a box. 这是什么？一只箱子。
作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。
也可模糊地指一般情形或上文的部分或整个意思。
译成汉语时，it 通常不一定译出来。
Its a long time since they left. 他们走后很久了。 Its two miles to the beach.离海滨有两英里远。
Thats just itI cant work when youre making so much
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noise.原因就在这里你弄出这么大的声音，我工作不了。
另外，需要注意两点：
Its time后面可以接不定式和介词短语表示是做??的时
候了。
如：
Its time for supper.Its time to have supper. Its
time后面还可以接一个从句，但是从句中的谓语动词一定要用过去
式即虚拟语气，如：
Its time we had lunch.是我们吃饭的时候了。
Its time we started.是我们该出发的时候了。
2. it 用作引导词作形式主语由动词不定式、
动词-ing 短语或名词性从句担任主语的句子，常用 it 来作形式主
语，而把真正的主语放在句子的后面。
Its not easy for us to learn English well. [句型为:
It +be+形容词+to do sth.] Its foolish of you to say that to her.
[句型为: It +be+形容词++to do sth.] Its no
use/good/helpsleeping too much. Its important that
we be there on time. Its high time that Tom went to school. It was the second time that he had telephoned me that day. [句
型为: It +be+ the firsttime +that 从句] It was arranged
that they should leave the following winter. It appears
that the two leaders are holding secret talks. 作形
---------------------------------------------------------------最新资料推荐------------------------------------------------------ 式宾语当宾语是动词不定式、动词-ing 短语或名词性从句时，而宾语后又有宾语补足语，则需用 it 作形式宾语，将真正的宾语放到宾语补足语的后面。
用于这种结构的动词有：
feel, find, think, make, consider, take等。
Marx found it important to study the situation in Russia.马克思发现研究俄国的形势很重要。
I find it strange that she doesnt want to travel.她竟不想旅游,我觉得很奇怪。
I ll make it clear to you that failure is the mother of success.我要告诉你们失败是成功之母。
3. it 用在强调句型中英语中，为了突出句子中的某一成分，达到强调或使人特别注意该成分的目的，人们常用It is/was+强调对象 +who/whom/that.句式把整个句子分割成前后两个部分，使之各自有自己的谓语动词，中间由 that 或 who/whom连起来成为一个新句子。
除强调人时用 who, whom 外，其余情况都用连词 that。
被强调的对象仅限于句子的主语、宾语、宾语补足语和部分状语，即除谓语和定语以外的句子成分。
这部分状语主要包括地点状语、由 before, when, after, not until 等引起的时间状语从句、由 because, because of 引起的原
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因状语、由 by 引起的方式状语等。
当被强调的对象是人时，可用 who, whom 或 that，其余情况一律用 that; 当被强调对象在从句中做主语时用who/that,当被强调对象在从句中做宾语时用 whom/that。
原句：
My father did the experiment in the lab yesterday evening.昨天晚上我父亲在实验室做实验。
It was my father did the experiment in the lab yesterday evening.昨天晚上是我父亲在实验室做实验。
It was the experiment that my father did in the lab yesterday evening.昨天晚上我父亲在实验室里做的是实验。
It was yesterday evening that my father did the experiment in the lab.我父亲是昨天晚上在实验室做实验的。
It was in the lab that my father did the experiment yesterday evening.我父亲昨天晚上是在实验室里做这个实验的。
另外，再注意两点：
强调句如果还原成陈述句的话，句子成分是完整的，如果不完整，那必然是别的从句而不是强调句。
It was the town where we lived for three years.此句是定语从句，因为还原以后的句子为: We lived the town for three years.缺少介词, 而 It was in the town that we lived for three years.这就是一个强调句了。
