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it在強調句中的使用

先看看這道題：

__________ these boys that played tricks on their teachers.

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

【分析】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)＋其他

該句型應注意以下幾點：

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?