It is……that强调句用法
当需要强调句中的主语、宾语、状语时，我们常用“It is(was)+被强调部分+that(who)”这种句型，使用此句型时，应注意以下几 点。
1.一般情况用It is(was)……that…如：
He read three books in the library yesterday.
我们分别可以强调主语、宾语、地点状语和时间状语。如：
It was he who(that)read three books in the library yesterday.
(强调主语)
It was three books that he read in the library yesterday.(强调宾语)
It was in the library that he read three books yesterday.
(强调时间状语)
2.当被强调部分指人时，可用that，也可用who；指物时，只用that,如：
It was Tom who(that)I met last week.
It is a new bike that his brother wants to buy.
3.强调状语时，只用that,不用when、where.如：
It is at 5 o'clock that the train will arrive.
4.被强调的部分是主语时，注意句子的谓语动词和被强调的主语保持一致。如：
It is he who is late.
2月2龙抬头禁忌It is they that were late.
5.一般疑问句的强调句为:Is (was) it + that…?
特殊疑问句为：特殊疑问词+ is (was) it +that…?结构。如 ：
水浒传故事梗概Was it ten years ago that his father died?（他的父亲是十年前去世的吗？）
When is it that you will t off?（你到底什么时候出发？）
6.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 。
比较：Was it by plane that did he come back ?(×)
红包168是什么意思 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.强调时间状语和地点状语时与定语从句的区别：
It was in 1921 that our Party was founded.(强调句式)
It was 1921 when our Party was founded.(定语从句)
父亲威胁将3岁儿子扔下14楼被捕
即：强调时间或地点时有介词置于其前时，则连接词用that。其前面应有介词而被省去时，则用连接词when（时间）或where(地点)。又如：
It was on the farm that we practid planting crops.
It was the farm where we learned a lot .
8.not until 结构的强调：
We did not get off the bus until it stopped .
It was not until it stopped that we got off the bus.(注意：强调该结构时not until不能分开)
巩固练习：
1.It is the poisonous products______can cau the symptom（症状）
of the flu（流感）, such as headache and aching muscles. (2003 )
A. who B. that C. how D. what
2.________was in 1979 _____I graduated from the university..
A.That ...that that when D. It...when
3.It was for this reason__________her uncle moved out of New York
and ttled down in a small village. (2001 )
A. which B. why C. that D. how
4.-Where was it__________the road accident happened yesterday ?
-In front of the market.
A. when B. that C. which D. how
5.哪款智能手环好It was not until she had arrived home__________her appointment
with the doctor.
A. did she remember B. that she remembered
C. when she remembered D. had she remembered
6.It was not until 1956__________liberated.
A. that the town was B. did the town
C. was the town D. that was the town
钾矿7.Why,I have nothing to confess(招供，供认)._________you want me to
say?
A.What is it that B. What it is that
C.How is it that D.How it is that
小窗幽记全文8.It was only with the help of the local guide____.
A.was the mountain climber rescued
洛赛克
B.that the mountain climber was rescued
C.when the mountain climber was rescued
D.then the mountain climber was rescued
