Exercise：

1) It is Mary who often ____ (help) me with my English.

2) It is I that ____ (be) against you.

3) It is the boy students of Class Two who ____ (be) playing football on the playground.

　1) helps 2) am 3) are

② 人称照应：强调主语用主格，强调宾语用宾格。

It is I who am wrong.

It was her whom I saw in the street just now.

1) 这次得冠军的是她。

　 It was she that won the championship this time.

2) 你明天要去采访的是他。

It is him who you will interview tomorrow.

③ 问句形式：

一般问句：Is/Was it + 被强调部分+ that + ...

Is it the dictionary that you are looking for?

Was it yesterday that he was fired?

特殊问句：疑问词+is/was +it +that+...

What is it that you want me to do ?

Who was it that told you the news?

When was it that you called me?

How was it that you succeed?

Exercise：

1) 他想申请的是这家公司吗？

　Is this company that he wants to apply for?

2) 你们是在哪里买到这本小说的？

　Where was it that you bought the novel?

④ 当强调not ... until结构时，必须将not until连用,后面接肯定式。

1) I didn't realize what trouble he was in until at that time.（对划线部分强调）

　It was not until at that time that I realized what trouble he was in.

2) The teacher didn't stop his lesson until the bell rang. (改成强调句）

　It was not until the bell rang that the teacher stopped his lesson.

3) 直到他父亲来了男孩才开始做作业。

　It was not until his father came that the boy began to do his homework.

c. 强调句型的判断

　把"It is/was-that"去掉，如果剩余部分句子结构仍然完整，那么这个句子就是强调句；如果句子不完整，则不是强调句。如：

It is true that he once went to America.主语从句

It was at 8 o'clock that he came back. 强调句型

中华资源库Exercise：If wrong, please correct them.

1) Was it in 1997 Hongkong returned? (True) =Was it in 1997 that Hongkong ...?

2) It was her I viewed as my best advisor. (True) =It was her whom/ that I ...

3) It was then when mum came back. (False) 改为：It was then that mum ...