強調句的概念：

強調句 (The Emphatic Pattern) 是一種修辭，是人們?yōu)榱吮磉_自己的意愿或情感而使用的一種形式。通過各種方式對句子中的某個部分進行強調，從而起到修辭的作用。英語常用的強調結構有：It is (was)+被強調部分(主語、賓語或狀語)+that/who...；what…be…句型；

強調句的使用:

一、強調句句型：
1、用It is／was...that／who...句型表示強調。
（1）陳述句的強調句型：It is/was+被強調部分（通常是主語、賓語或狀語）+that/who（當強調主語且主語指人）+其它部分。
e.g. It was yesterday that he met Li Ping.
（2）一般疑問句的強調句型：同上，只是把is/was提到it前面。
e.g. Was it yesterday that he met Li Ping?
（3）特殊疑問句的強調句型：被強調部分（通常是疑問代詞或疑問副詞）+is/was+it+that/who+其它部分？
e.g. When and where was it that you were born?
注：被強調的部分（通常是句子的主語、狀語、賓語或賓語補足語）放在is／was的后面，如被強調的是人，則后面可用who，whom等代替。
如：原句：He met an old friend in the park yesterday.
強調主語：It was he who/that met an old friend in the park yesterday.
強調賓語：It was an old friend that/who he met in the park yesterday.
強調地點狀語：It was in the park that he met an old friend yesterday.
強調時間狀語：It was yesterday that he met an old friend in the park.
2、用助動詞do, does或did來強調謂語動詞。
如：Do come early.
He did send you a letter last week.
We're pleased that she does intend to come.
3、用主語從句+be+被強調部分，主語從句常用what引導。
如：What John wants is a ball.
What Mary does every day is(to) give piano lessons.

二、not...until...句型的強調句：
1、句型為：It is/was not until+被強調部分+that+其它部分：
e.g. 普通句：He didn't go to bed until/till his wife came back.
強調句：It was not until his wife came back that he went to bed.
2、注意：此句型只用until，不用till。但如果不是強調句型，till, until可通用；
因為句型中It is/was not...已經是否定句了，that后面的從句要用肯定句，切勿再用否定句了。

三、謂語動詞的強調：
1、It is/was...that...結構不能強調謂語，如果需要強調謂語時，用助動詞do/does或did。
e.g. Do sit down.務必請坐。
He did write to you last week. 上周他確實給你寫了信。
Do be careful when you cross the street. 過馬路時，務必（千萬）要小心��！
2、注意：此種強調只用do/does和did，沒有別的形式；過去時用did，后面的謂語動詞用原形。

使用強調句型有以下幾點請注意：

①強調句的謂語is或was永遠用單數。
如：It was yesterday that I met your father in the street.
②不管被強調部分是哪種狀語，只能用that連接，不得使用where、when等連詞。
如：It was in the street that I met your father yesterday.
③被強調部分為人時，可用who(主格或賓格)和whom(賓格)代替that，用that也行。
如：It was your father that/whom/who I met in the street yesterday.
It was I that/who met your father in the street yesterday.
④強調句中也要注意主謂一致、人稱一致和否定轉移的問題。
如：It is they who are our friends.
It was not until ten o'clock that we got home last night.
⑤注意不要混淆強調句和其他從句。It is/was...that...為強調句標志，去掉后仍可組成一個完整的句子，只是沒被強調，而其他從句一般不具備這一特征。
比較：1）It was ten o'clock when we got home last night. 我們昨晚到家時已十點了。
2）It was at ten o'clock that we got home last night. 我們昨晚是在十點到家的。
第一句不是強調句，when不可改為that，因為去掉it was和that后，只能組成“We got home ten o'clock last night.”這樣一個不完整的句子；第二句是強調句，that不可改為when。

強調句型用法拓展：

1、句首詞用“It”，不能用“This”，“That”等。
2、be動詞的形式是is或was，不能用復數形式are或were。若原句的謂語動詞用了現在時或將來時，則用is；
若原句的謂語動詞用了過去時或過去完成時，則用was。
如：It___the Chinese women that___a great role in the socialist construction.
A. is; plays
B. are; play
C .is; play
D. are; plays
答案：C
3、被強調的部分如果是代詞，強調主語用主格，強調賓語用賓格。
如：It is him that/who/whom I met in the street yesterday.
It is I who/that am wrong.
4、連接詞一般用that，當強調部分是人時，既可用that也可用who。特別注意當強調部分是時間狀語或地點狀語時，不能用when或where。
如：It was on Oct1st, 1949 that People's Republic of China was founded.
It was at the gate____he told me the news.　　
A. that
B. what
C. which
D. when
答案：A
5、主謂一致問題被強調的主語要和that后面的謂語動詞在數上保持一致。
如：It is Mary who often _____(help) me with my English. （helps）
It is I that ____(be) against you. （am）
6、not...until結構的強調。
強調“not...until”引導的時間狀語時，要用“it is/was not until...that...”結構，that后面的句子要用肯定式，且須用陳述句語序。
如：We did not get off the bus until it stopped. ?
It was not until it stopped that we got off the bus. (注意：強調該結構時not until不能分開)

本文來自：逍遙右腦記憶 http://portlandfoamroofing.com/gaozhong/259061.html

相關閱讀：十個技巧幫你快速提高英語閱讀速度_0