1.强调句型“It is / was…that / who / whom…
A）Tom does the experiment in the factory everyday.汤姆每天在工厂里做实验。
B）It is Tom who (that) does experiment in the factory eve ryday.是汤姆每天在工厂里做实验。（强调主语）
C）It is the experiment that Tom does in the factory everyday.汤姆每天在工厂里做的是实验。（强调宾语）
D）It is in the factory that Tom does the experiment everyday.汤姆每天是在工厂里做实验。（强调状语）
E）It is everyday that Tom does experiment in the factory.汤姆是每天在工厂里做实验。（强调状语）
1) 强调时间、地点、原因或方式状语时，要用that,不能用when, where, why或how。
It was at the gate of our school that we gave the visitors a warm welcome. (强调地点状语)
It was with great joy that he received the news that his long lost son would soon return home. (强调程度状语)
It is by bus that Mary usually goes to school. (强调方式状语)
It was three years ago that I came to this school. (强调时间状语)
It was on Monday night that all this happened.这一切是发生在星期一晚上。
It was because he was ill that he didn't go to school.他是因并而没来上学的。
It was in a different way that they played the game.他们比赛的方式是不同的。
It was not until 11 o'clock last night that my father returned.我父亲昨夜直到11点才回来。
例1对句：As he had no car, he stayed at home.
错句：It was as he had no car that he stayed at home.
例2对句：Although they are poor, they are generous.
错句：It is although they are poor that they are generous.
3) 对"not...until..."结构的强调，要用"It is/was not until...that..."这一固定句型。由于否定已经前移，that后只能用肯定形式。如：
1.It was not until she took off her dark glasses that I realized she was a famous film star.
例1) It was in the evening that the soldiers arrived at the small mountain village. (强调句型)
It was evening when the soldiers arrived at the small mountain village.(when引导时间状语从句，it表示时间)
例2) It was at 3 o'clock that they came back. (强调句型)
It was 3 o'clock when they came back. (when引导时间状语从句，it表示时间)
例3) It is for three hours that they have been back. (强调句型)
It was three hours before they came back. (before引导时间状语从句，it表示时间)
It is three hours since they came back. (since引导时间状语从句，it表示时间)
再如：It was raining when they came back.
It is true that he once went to Canada.
It is a surprise that Mary should have won the first prize.
Was it at the school which was named after a hero that he spent his childhood?
It was in the shop which was opened last month that he bought the book.
It was the girl whose father worked abroad that lent me the book.
Was it in 1982 when you were in college that you got to know her?
a. 强调句的一般疑问句结构为：Is/Was it...that/who...?
Is it you who often help the old woman with her housework ?
Was it in her fifties that Mary began to learn Russian ?
Was it at a theatre that Abraham Lincoln was shot ?
b. 强调句的特殊疑问句结构为：疑问词＋is/was it that...？注意在强调句的疑问句型中，强调标志that/who后只能使用陈述语序。
例1： When was it that he made up his mind to take this course?他什么时候决定选修这一课程的？
例2：Why is it that he doesn’t like the book?他为什么不喜欢这本书？
例3：Who was it that invented the telephone?
例4 :How was it that they managed to finish the work in such a short time ?
例5Where was it that you found the lost child ?
比较：Was it by plane that did he come back ?(×)
Was it by plane that he came back? (√)
When was it that the Second World War broke out? (√)
When was it that did the Second World War break out ?(×)
7）“It is + a + 形容词 +名词 + that”表示"无论怎样……都不……"，是一种反语式的强调用法；这一句型的肯定形式一般表示否定意义，反之否定形式表示肯定意义。
例 1 It is a wise man that never makes mistakes. 智者千虑，必有一失。
例 2 It is a wise father that knows his own child.无论怎样聪明的父亲，也不会完全了解自己的孩子。
例3 It’s an ill wind that blows nobody（any）good．此失则彼得，没有使所有的人都受害的坏事。
2.强调句型“what is / was…”
例1What he is is a genius.要说他是个什么的话，他是个天才。
例2What I want to do now is to beat him.现在我想做的是揍他。
例3What I like is her style. 我喜欢的是她的风格。
例1The little girl does want to see her mother.这个女孩非常想见她的母亲。
例2I do like to eat apples.我的确喜欢吃苹果。
例3Do stay a while.务请待会儿。
例4They did study very hard yesterday.
其他强调词如at all, very, just, ever, not half / nearly / possible，by all possible means, by all means, by no means, nothing but，by far, no matter wh-等。
例1I don’t know him at all.我根本不知道他。（at all在否定句中含义为“根本不”）
例2Do you know him at all?你究竟知不知道他？（at all在疑问句中的含义为“究竟”）
例3What is worth doing at all is worth doing well.凡是值得做的，就应该好好做。（肯定句中at all为“只要有一丝毫”）
例4This is the very book I want.这正是我所要的书。
例5My very own fault is to trust him.我真正的过错就是相信他。
例6What ever do you want?你到底想要什么？(此处ever和疑问代词不能写在一起)
例7Who ever will come?究竟是谁来？
例8My homework is not half done yet.我的家庭作业根本没有做。
例9We must help him by all possible means.我们一定尽一切可能帮助他。
例11He is nothing but a liar.他不过是个骗子。
例12No matter when you call on me，you are welcome.不论你什么时候来，我都欢迎。