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There was somebody standing in front of the shop, but I couldn’t see who it was. 商店前站著一個人，但我沒看清是誰。

A：Who has let out the secret? 是誰泄漏了密秘?

B：It must be a big mouth. 一定是個快嘴。

A：I hear a knock at the door. 我聽見有人在敲門。

B：It must be the postman. 一定是郵遞員來了。

A：Do you know who that is? 你知道那個人是誰嗎?

B：I suppose it is Mary’s father. 我想那是瑪麗的父親。

6. it在某些固定句式中的使用

Does ______ matter if he can’t finish the job on time?

A. this                     B. that                     C. he                       D. it

此題選 D。注意在以下句式中通常都用it作主語：

It looks as if that he is very rich. 他看起來好象很富有。

It seems that he is interested in music. 他似乎對音樂有興趣。

It appears as if they have lost interest. 看來他們已失去了興趣。

It happened that he was there with us. 碰巧他當時和我們在一起。

It matters little if I miss my bus. 即使我沒搭上公共汽車也沒什么大不了的。

順便說一下It doesn’t matter. 的有關用法：

1. It doesn’t matter. 單獨使用(即其后不接詞)時，也可說成 That doesn’t matter. 其意為“沒關系”(主要用來回答道歉和表示某事不是很重要)：

A：Would you go there with me? 你愿和我一起去嗎?

B：I’d like to, but I have to post these letters.

我很愿意去，但我要去寄這些信。

A：That [It] doesn’t matter. 沒關系。

2. It doesn’t matter. 若不是單獨使用, 而是在其后跟有從句, 則句首的it便不能改為that：

It doesn’t matter to me whether she is pleasedor not. 她是否滿意對我而言并不重要。

7. it在強調句中的使用

______ these boys that played tricks on their teachers.

A. They were            B. It were                 C. There were           D. It was

此題應D。這是一個強調句型，其基本結構為：

It is＋被強調部分＋that(who)＋其它

該句型應注意以下幾點：(m.52ysedu.com)

1. 不管被強調部分是單數還是復數，其前一律用It is / It was，而不能用They are / There were之類的。

2. 被強調部分是指人時，被強調部分后可用that / who，被強調部分指物時，被強調部分后只能用that。

3. 被強調部分是指時間或地點時，被強調部分后通常用that，一般不用when, where之類的。

It is I who am right. 是我對。

It was you that were wrong. 是你錯了。

It was in the Japan that he died. 他是死于日本。

It was yesterday that he got married. 他是昨天結婚的。

It was a computer that he bought last week. 他上個星期買的是一臺電腦。

Where was it that she lived? 她是住在什么地方?

When was it that he left for Japan? 他是什么時候離開去日本的?

Who is it that teaches you English? 是誰教你們英語?

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