句子結構比較複雜時，尤其是當被強調成分比較複雜時，有的同學們就不能識別句子所用的強調結構，從而不能正確作出選擇。如：
It was lack of money, not of effort, that defeated their plan.
他們的計劃受挫，原因是缺少錢而不是沒有盡力。
It was more in sorrow than in anger that he criticized his former colleague.
他批評以前的同事，並非出於氣憤而是為他惋惜。
It is the protection for the trees that really matters, rather than how many trees are planted.
真正重要的在於對樹木的保護，而不在於種了多少樹。
As far as he’s concerned, it’s not doing something wrong that matters, but not being caught doing something wrong,
就他而論，重要的不是做錯事，而是做錯事不被抓住。
請看兩道題：
(1) It is not who is right but what is right _______ is of importance.
A. which B. it C. that D. this
答案為C。此題考查it is…that…這一強調句式，被強調的是not who is right but what is right，全句意為：重要的不是誰是對的，而是什麼才是對的。
有時考查not…but…的同義結構…rather than…與強調結構的綜合運用。如：
(2) It is what you do rather than what you say _______matters
A. that B. what C. which D. this
答案為A。被強調成分為what you do rather than what you say，全句意為：重要的是看你怎麼做，而不是看你怎麼說。
英語語法強調句知識點：It …句式通常不能強調哪些成分有這樣一道考題：
It was a teacher that she __________.
A. was B. seemed C. looked D. married
此題應選D。從句意上看似乎4個選項都行，其實這裡只能填D。因為填A，B，C 中的任意一個選項，都會導致句中的 a teacher成為表語，然而按照強調句句法規則，It 這一強調句型是不能強調錶語的。一般說來，以下成分不能用於強調句中的被強調部分：
1. 表語：
她很美。
正：She is beautiful.
誤：It is beautiful she is.
他是醫生。
正：He is a doctor.
誤：It is a doctor that he is.
但是賓語補足語卻可以用作被強調部分：
他們選他擔任主席。
正：They elected him chairman.
正：It was chairman that they elected him.
2. since 和 as 引導的原因狀語從句(但 because 從句卻可以)：
他不能來是因為他病了。
正：It is because he is ill that he can’t come.
誤：It is since[as] he’s ill that he can’t come.
3. although 引導的讓步狀語從句：
雖然累了，但他還是去了。
正：He went although he was tired.
誤：It was although he was tired that he went.
英語語法強調句知識點：強調句式強調狀語的五種型別一、所強調的狀語為單個的副詞
能用於強調句被強調的副詞不多，下面略舉幾例：
It was here that he differed from an Englishman.
他和英國人的不同就在於此。
It was only then that I began to learn the unpalatable truth about John.
直到那時我才開始瞭解到有關約翰的一些令人難以接受的實情。
It was yesterday that my secretary sent the bill to Mr Harding.
我的祕書是在昨天把賬單送給哈丁先生的。
二、所強調的狀語為融詞性短語
所謂副詞性短語，就是指起副詞作用可用狀語的短語，如last week， some time ago， three days later等。如：
It was about 600 years ago that the first clock with a face and an hour hand was made.
第一面帶有一個鐘面和一根時針的鐘是在大約600年前製造的。
It was only last February that he announced he would run for president.
去年2月他才宣佈自己將參加總統競選。
It was last night that John wore his best suit to the dance.
約翰是昨晚穿著他最好的衣服去參加舞會的。
三、所強調的狀語為介詞短語
介詞短語的最主要功能就是用作狀語，所以在強調句中，強呼叫作狀語的介詞短語的現象十分普遍。如：
It was through hard work that he succeeded.
他是通過自己的勤奮工作而成功的。
It was only after his death that she learned of his affair with Betty.
一直到他死後她才知道他和貝蒂有染。
It was along the Mississippi River that Mark Twain spent much of his childhood.
正是在密西西比河沿岸，馬克·吐溫度過了他童年的大部分時間。
It was for this reason that her uncle moved out of New York and settled down in a small village.
這就是她的叔叔離開紐約，搬到一個小山村住下來的原因。
It is only on the world market that we can prove the competitiveness and quality of our goods.
只有在國際市場上我們才能證明自身商品的競爭力和質量。
It was thanks to your stupidity that we lost the game.
我們輸掉比賽是由於你的愚蠢。
四、所強調的狀語為狀語從句
It was after he got what he had desired that he realized it was not so important.
在他得到自己所渴望的東西后，他意識到那並不是那麼重要。
It was because I wanted to buy a dictionary that I went to town yesterday.
我昨天是由於想買本字典而進城的。
It was only when I read her letter that I realised what was happening.
一直到我讀了她的信以後，我才意識到發生了什麼事。
五、所強調的狀語涉及not…until…句式
l...句式中的until可能是介詞(用於引出介詞短語作狀語)也可能是連詞(用於引出從句作狀語)。這類句式的基本結構是It is (was) not ...(注意that後面的句子要用肯定式)。如：
It was not until the meal was over that he turned up.
一直到用餐結束以前，他都沒有現身。
It was not until I met you that I knew real happiness.
直到我遇到你以後，我才真正體會到幸福。
It was not until 1911 that the first of the vitamins was identified.
直到1911年才發現了第一種維生素。
It was not until I saw him laughing that I realized what a fool I had been.
直到我看見他笑了，我才意識到我是多麼笨。
英語語法強調句知識點：英語強調句的七種方式我們在說話或寫文章時，為了要突出句子中的某一部分，我們通常會使用某種方法或手段使它突出，以便能引起他人的注意，這就是強調，與此相關的句子就是強調句。英語表示強調的方法很多，比如在口語中可以用重讀來強調，在書面語中則可通過使用表示強調意義的詞語來強調，也可以通過將被強調成分置於句首這樣的“顯要”位置來強調，還可以使用專門的強調句式來強調。
■用助動詞do來強調
當句子中沒有其他的助動詞時，我們可以在動詞前使用助動詞do表示對該動詞的強調。如：
Do be careful with that vase! 務必小心那個花瓶!
I do hope you’ll stay for lunch. 我真的希望你留下吃午飯。
用於表示強調的do可以有時態的變化，但其後的動詞要用原形。如：
He does look tired. 他確實顯得很疲倦。
He did come but soon went back. 他的確來過，但很快就回去了。
She did write to say thank you. 她的確寫信向你道謝了。
注意，這樣用的do只用於現在時或過去式(即只有do, does, did這樣的.形式)，不能用於進行時、完成時等形式(如不用於is doing, has done等)。
■用某些形容詞來強調
英語中用於強調的形容詞比較多，比如那些表示“極端”和“完全”概念的形容詞通常就可以用於表示強調，這類形容詞主要的有：
mere 僅僅的 very 極端的
outright 完全的 thorough 十足的
plain 完全的 complete 徹底的
pure 完全的 perfect 全然的
Jim looked a perfect fool. 吉姆看起來像一個十足的傻瓜。
At that very moment the phone rang. 正好在那個時候電話鈴響了。
We gave the room a thorough cleaning. 我們把房間徹底打掃了一番。
■用某些副詞來強調
英語中有不少副詞可以用於表示強調，比如only就是其中的一個。如：
You may put the meeting off only when it is absolutely necessary. 你們可以把會議推遲，但只是在絕對必要時才能這樣做。
試比較：
Only I kissed her last night. 昨晚只有我吻了她。
I only kissed her last night. 昨晚只是吻了她。
I kissed only her last night. 昨晚我吻的只有她。
I kissed her only last night [last night only]. 我只是在昨晚才吻了她。
■用句首位置來強調
在英語中，句首位置是通常用於表示強調的一個地方，當某個本來不應置於句首的成分放在句首，往往會對這個成分構成強調。比較：
普通：He kept this job twenty years. 這個工作他做了20年。
強調：This job he kept twenty years. 他做這個工作做了20年。
普通：The students can understand this. 學生們是理解這一點的。
強調：This the students can understand. 這一點學生們是理解的。
普通：I know that she is a good girl. 我知道她是一個好姑娘。
強調：That she is a good girl I know. 她是一個好姑娘，我是知道的。
普通：Press the red button to switch on. 請按紅色按鈕開機。
強調：To switch on, press red button. 要開機，請按紅色按鈕。
■用定語從句來強調
有時我們可以使用定語從句來對一個名詞進行強調，如用the person who, the thing that, the place where, the day when, the reason why這樣的結構，把需要強調的名詞與定語從句連在一起。比較：
普通：Mary keeps pigs in the garden shed. 瑪麗在花園的棚子裡養豬。
強調：Mary is the person who keeps pigs in the garden shed. 瑪麗就是在花園的棚子裡養豬的那個人。(強調Mary)
強調：The garden shed is the place where Mary keeps pigs. 花園裡的棚子就是瑪麗養豬的地方。(強調the garden shed)
強調：The place where Mary keeps pigs is the garden shed. 瑪麗養豬的地方是花園裡的棚子。(強調the place where Mary keeps pigs)
■用what從句來強調
當what的意思是表示“所……的……”時，它通常具有強調意味，此時的what通常相當於“先行詞+關係代詞”結構。如：
This is what I have to say. 這就是我所要說的話。
句中的what相當於the thing that。
What he says is not important. 他說的話並不重要。
句中的what也相當於the thing that。
He is no longer what he was. 他已經不是以前的他了。
句中的what相當於the person who。
另外，what從句有時還可以用於強調動詞。如：
What we can do is (to) write to him. 我們唯一能做的事是給他寫信。
What you do is (to) mix the eggs with flour 你要做的事是把麵粉和雞蛋攪和在一起。
■用強調結構來強調
英語中表示強調時有一個很重要的句型，那就是“it is (was)+被強調成分+that (who)+其他”結構。比較：
It was in the office that he was killed. 他是辦公室被殺害的。
It is the children who broke the window. 是孩子們打破窗戶的。
第一句的被強調的成分的是in the office，第二句的被強調成分是the children。其中that和who的區別是：當強調人時，可用that或who，當強調其他成分時，用that。注意，當強調時間和地點時，不能用when和 where 代替that。
在具體使用時，要特別注意這類強調句的疑問句形式。比較：
陳述句：It is because he is ill that he can’t come. 是因為生病他才沒有來。
一般疑問句：Is it because he is ill that he can’t come? 是因為生病他才沒有來嗎?
特殊疑問句：Why is it that he can’t come? 他為什麼不能來?
另外，還要注意l…這一句型的強調句莆式，它的基本形式是It is (was) not until…that…。
如：
直到我遇到你以後，我才真正體會到幸福。
正常：I didn’t know real happiness until I met you.
強調：It was not until I met you that I knew real happiness.
直到吃完飯他才現身。
正常：He didn’t turn up until the meal was over.
強調：It was not until the meal was over that he turned up.
英語語法強調句知識點：強調結構的疑問式及回答一、一般疑問句
A：Was it you who put these books on my desk? 是你把這些書放到我桌上的嗎?
(比較原句：Did you put these books on my desk? )
B：Yes, it was. 是我。
二、特殊疑問句
A：Who was it that gave you the book? 是誰給了你這本書?
(比較原句：Who gave you the book?)
B：It was Tom. 是湯姆給我的。
A：How is it that he goes to school every day? 他每天是怎樣去上學的?
(比較原句：How does he go to school every day?)
B：It is by bike. 是騎自行車去的。
三、反意疑問句
A：It was Tom broke the window, wasn’t it? 是湯姆打爛窗戶的，對嗎?
B：Yes, it was. 是的。
英語語法強調句知識點：強調結構能強調哪些成分強調結構是：It +is/was+被強調成分+that+句子的剩餘部分。如果我們要強調一個句子的某個部分時，就將要強調的那個部分放在it is/was與that之間，而句子的其餘部分原封不動地直接放在that之後。此結構可強調除謂語動詞外的各種成分。
(1) 強調主語
It was he that saw Mr. Wang on TV yesterday. 是他在電視上看到了王先生。
(2) 強調賓語
It was Mr. Wang that he saw on TV yesterday. 他昨天在電視上看到的是王先生。
(3) 強調補語
It is green that he has pained the door. 他把門漆成綠色了。
(4) 強調錶語
It is a doctor that he has become. 他已成為一名教師了。
(5) 強調地點狀語
It was on TV that he saw Mr. Wang yesterday. 他昨天是在電視上看到王先生的。
(6) 強調時間狀語
It was yesterday that he saw Mr. Wang on TV. 是昨天他在電視看到王先生。
(7) 強調方式狀語
It was by bike that we went to the park. 我們是騎自行車去公園的。
(8) 強調各類從句
It was what he said that surprised me. 是他講的話讓我吃諒。
It is because the book is so useful for my work that I bought it. 正因為這本書對我很有用，我才買它。
It was just as he ordered that she acted. 她正是照他吩咐的去做的。
(9) 強調not…until…中的時間狀語
It was not until 12 o’clock that he went to bed. 直到12點他才睡。(比較原句：He didn’t go to bed until 12 o’clock. )
It was not until his father came back home that he went to bed. 直到他父親回到家裡他才睡。
(比較原句：He didn’t go to bed until his father came back home.)
(10) 強調非謂語動詞
It was playing computer games that cost the boy a lot of money.
電腦遊戲花掉了這個孩子許多錢。
It was to get my brakes repaired that I brought my car in, not to get the engine replaced!
我開車來是修理剎車的而不是來換動力的。
