一、基本结构

It is \was +被强调部分+that\who+其余部分，这种句型可用来强调谓语动词以外的任何句子成分。

强调主语

It was she who had been wrong .

强调宾语或介宾

It was Mary that John give a handbag to at Christmas.

It was a handbag that John give Mary at Christmas.

It was to me that she gave the money.

强调状语

It was on Monday night that all happened .

It was in Beijing that he lived ten years ago .

It was in a different way that they played the game .

It was not until 11 last night that my father returned.

It was because he was ill that he did not go to school.

二、谓语动词

be的确定：如果叙述的是现在或将来的事情，动词用is；如果叙述的是过去发生的事情，后面则用was。强调句的时态一般应一致，即主句与从句的时态应皆用现在时；或皆用过去时；谓语动词除be之外，还可以用will be ,is going to be ,might be或must have been.

It is not I who am angry.

It was my two sisters who knew her best .

It might de tomorrow that he should arrive.

It must have been a newspaper reporter that came yesterday.

三、连接词

若被强调的部分是人即可用that也可用who；若被强调的部分是物应用that

It was you who\that broke the window.

It was the book that I borrowed from you.

四、强调句型的考点归纳

1、以一般疑问句的形式出现

Was_____that I saw last night at the concert ?

 A、it you B、not you C、you D、that yourself

2、以特殊疑问句的形式出现

____  is  it _____has made Peter____he is today ？

A、what ;that ;that    B、That ;that :what    C、What ;what ;that    D、What ;that ;what

3、以名词性从句的形式出现。

I have already forgotten______you put the dictionary.

A、 that it was there    B、where was it that    C、that where it was     D、where it was that

本题是经过变形的强调句型用作宾语从句的体现。

第一步：复原

It was on the desk that I put the dictionary.

第二步：对划线部分提问

Where was it you put the dictionary?

第三步：变为陈述语序，将其用作宾语从句，即改题答案。应为D.

4、与定语从句相结合

It was in the lab _____was taken charge of by Professor Harris_____they did the experiment.

A、which; that     B、that; what    C、whom; that     D、which; where

析：the lab 后跟that 引导的定语从句。

5、与not........until句型结合。

It was not until it got dark that I left..

原句为：I did not leave until it got dark.

四、相似句型辨析：

1、"It +be+被强调部分+that+........"句型是强调句，去掉it ,be和that 后，剩余部分能组成一个完整的句子]。

2、“It +be+adj./n./过去分词+that 从句”句型。

该句型中的it形式主语，that引导的从句是真正的主语。

It is important that he should learn English well.

3、“it is ＋不及物动词＋从句”

It seems that… 似乎…

It happened that… 碰巧…

4、“It+be+时间段+since......”句型表示“自从......以有多久了”。

It is two months since he fell ill.

5、“It +be+...before ...”句型表示“ .......多久后发生.......”。

It was a long time before they met again.

6、It is/was +时间点名词+when…“当…时已是…时间了”

It was 10 o’clock in the evening when he came back.

他回来时已是夜里10点了。

五、注意问题：

1、被强调的代词格应与原句一致，被强调的部分如果是原句的主语，who(that)后的谓语在人称和数上应与原句的主语一致；若是宾语则用宾格而不能用主格。

It is her that I am looking for.(√)

It is she that I am looking for.(×)

It was he that was referred to at the meeting.

2、被强调部分可能有一个以上的成分，也可能是一个较长的句子 。

It was not the fish but the vegetable, which grows only in Sichuan, that made the hot dish sour and aromatic,( Beijing  Weekend) ( 被强调部分: not the fish but the vegetable)

3、强调原因状语从句时，可以强调由because引导的原因状语从句，但不可以强调由since或as引导的原因状语从句。也不可以强调由although,whereas引导的丛属或并列从句。

It was because he was ill that he did not go to school.(√)

It is since he says so that It is true.(×)

It is whereas I am only a little tired that he is ill.(×).

4、不能强调条件、让步状语从句

If it rains ,we will not go out

we will try to finish the work in time though we are short of man power

不可以强调为：

It is If it rains that we will not go out

It is though we are short of man power that we will try to finish the work in time

5、可以强调由so that 引导的目的状语从句；不可以强调so that 引导的结果状语从句。

It was so that I could go fishing that I hired a boat.(√)

It was so that we had to walk that the bus broke down.(×)

6、对由until 引起的短语和从句强调，要注意否定前移

It was not until yesterday that I learned it.(√)

It was until yesterday that I did not learn it.(×)

7、强调状语时，只用that,不用when、where、 why或how。　

It is at 5 o'clock that the train will arrive.(√)

It is at 5 o'clock when the train will arrive.(×)

8、区分定语从句与强调句

It is ten years when Miss Green returned to Canada. (√)

It is ten years that Miss Green returned to Canada. (×)

去掉It be… that还应是一个完整的句子。而本句去掉 'It is…that'，只剩下ten years Miss Green returned to Canada. 不成句。因此本句不是强调句是定语从句。