Last night I saw a film in the Youth Palace.
强调主语：It wasIthat(or who)saw a film in the Youth Palace last night.
强调宾语：It wasa filmthat I saw in the Youth Palace last night.
强调地点状语：It wasin the Youth Palacethat I saw a film last night.
强调时间状语：It waslast night that I saw a film in the Youth Palace.
It isIwhoama teacher.
Itisthey who often help me with my lessons.
It was onlywhen I reread his poems recentlythat I began to appreciate their beauty.
It wasin the housethat the murder happened.
It wasbecause her mother was illthat she didn't go with us.
4强调句型：It is(was)not until...that...注意此时从句中的谓语动词要用肯定式。如：
It was not until 12 o'clock last night that my fathercamehome.
It was not until she took off her dark glasses that I realized shewasa famous film star.
Did this happen in Beijing?
Was it in Beijing that this happened?
Where were you born?
Where was it that you were born?
8）强调句型容易和句型It is/was+名词+that名词从句混淆。如果把构成强调句型结构的词It is(was)…that(who)…去掉，被强调部分归位后，应该能够形成一个完整的句子（这也是判断是否是强调句型的方法）。但后者的It is/was…that是不可去掉的，否则that前的名词就找不到位置，原句也不再成立，如下面这个句子如去掉It is/was…that就不再完整：
It was the rule of the school that the pupils should wear their school uniforms.
强调句型还容易跟It is/was+形容词+that名词从句这一句型混淆。如：It is clear(obvious,true,possible,certain....)that.....该句型中it是形式主语，真正的主语是that引导的主语从句，常译为”清楚(显然,真的,肯定…)”是主语从句最常见的一种结构。
It is very clear that he’s round and tall like a tree.
That he’s round and tall like a tree is very clear.
He told me that it was because he was late for class that he was punished.
I really can’t remember where it was that I first met the man.
It may be my bike that he is riding.
It must have been the manager that spoke to you.
Whom was it that Mr.Smith saw in the park yesterday?
Why is it that silver is not widely used as a conductor?
What a beautiful picture it is that you have drawn!
Was it Bill,who plays football well,that helped the blind man cross the road?
It was in the school,where（or：in which）I once studied,that we hold a party.
Was it in the house,which we visited last year,that the murder happened?
1）.It was from only a few supplies that she had bought in the village _______ the hostess cooked such a nice dinner.
A.where B.that C.when D.which
解析：迷惑点在于强调部分中含有一个定语从句that she had bought in the village。答案：B.
2）.John's success has nothing to do with good luck.It is years of hard work has made him what he is today.
A.why B.when C.which D.that
解析：答案：D。题干为强调句型，被强调部分为主语部分years of hard work，故选D项
3).It was _____ he came back from Africa that year _________ he met the girl he would like to marry.
A.when;then B.not;until C.not until;that D.only;when
强调句(The Emphatic Pattern)是一种修辞，是人们为了表达自己的意愿或情感而使用的一种形式。通过各种方式对句子中的某个部分进行强调，从而起到修辞的作用。英语常用的强调结构是"It is(was)+被强调部分(主语、宾语或状语)+who(that)..."。一般说来,被强调部分指人时,用who;指事物时用that,但that也可以指人。在美国英语中指事物时常用which来代替that。
例子It was yesterday that he met Li Ping.
例子Was it yesterday that he met Li Ping?
例子When and where was it that you were born?
A.句型为：It is/was not until+被强调部分+that+其他部分
普通句：He didn't go to bed until/till his wife came back.
强调句：It was not until his wife came back that he went to bed.
此句型只用until，不用till。但如果不是强调句型，till,until可通用;因为句型中It is/was not...已经是否定句了，that后面的从句要用肯定句，切勿再用否定句了。
Do sit down.务必请坐。
Do be careful when you cross the street.过马路时，务必(千万)要小心啊!
Some people do believe that nuclear power poses a threat to the world peace.
This is the very question that deserves careful analysis.
Taking part-time jobs is never without drawbacks.
What really matters is cooperation.
Little do people take into account the seriousness of this problem.
Nothing is more imperative than to learn from the past.
It is stability that destroys people’s ambition and barricades people’s steps.
It was because the water had risen that they could not cross the river。