句子1 It was along the Mississippi River that Mark Twain spent much of his childhood.
在密西西比河沿岸，马克·吐温度过了他大部分的童年时光。
【知识点】强调句型的基本结构是：It is/was/被强调部分/ that /其余部分。如果被强调部分是人，也可以用who代替that。如：
It was his teacher who he often referred to when in trouble.
他在困境中经常提到的那个人是他的老师。
注意：1.句首词用it，不能用this/that等。
2.be动词总用单数形式，即is或was，不能用复数形式are或were。
3.把it is/was和that去掉，如果剩余部分的句子结构仍然完整（被强调部分要还原到原位置），那么这个句子就是强调[提供/论文和论文/服务，/]句；如果句子结构不完整，则不是强调句。如：
（1）It was at the theatre that Lincoln was murdered.
（2）It was the theatre that Lincoln was murdered.
把两个句子中的it was和that去掉，我们可以看出，句（1）仍是一个完整的句子，是强调句；句（2）不完整，英语论文范文，不是强调句。
句子2 It was not until midnight that they reached the campsite.
直到午夜他们才到达野营地。
【知识点】若强调“not until...”句型中的“until...”部分，英语毕业论文，要将“not until...”放在it is/was与that之间。如：
It was not until I came here that I realized this place was famous，for not only its beauty but also its weather.
直到我来到这里，我才意识到这个地方出名，不仅因为它的美，而且因为它的天气。
注意：此句型只用until，不用till（如果不是强调句型，till和until可通用）。因为句型“It is/was not until...”已经是否定句，所以that后面的部分要用肯定句，切勿再用否定句。
句子3 Was it because of the heavy snowstorm in Europe that the flight had to be put off？
是因为欧洲的暴雪导致航班延误吗？
【知识点】强调句型的一般疑问句结构是：Is/Was it/被强调部分/that/who/其余部分？如：
Was it what I said or something I did that made you feel so low，Helen？
海伦，是我说了什么还是做了什么让你心情不好吗？
注意：在强调一般疑问句中的某一成分时，主句要用一般疑问句语序。被强调部分移走后，that后面的原句其余部分语序及形式都不变。
句子4 What was it that made Daisy wild with joy？
是什么让黛西欣喜若狂？
【知识点】强调句型的特殊疑问句结构是：被强调部分（通常是特殊疑问词）/is/was it/that/其余部分？如：
—How is it that you write so well？
—By reading and keeping diaries every day.
—你怎么写得那么好？
—通过每天阅读和写日记。
句子5 Please tell me who it was that broke the vase.
请告诉我是谁打碎了花瓶。
【知识点】被强调部分是从句连词时，连词的位置不变，只在连词后面加上it is/was that即可。如：
I wonder how it is that she is not so cheerful as she used to be.
我想知道是什么让她不像过去那样快乐。
句子6 —Where did you learn to swim？
—It was in the pool where we used to wash clothes.
—你在哪里学会游泳的？
—是在我们过去洗衣服的那个水池里。
【知识点】情景对话中，强调句型常省略that及其后面与上句重复的部分内容。以上对话中where we used to wash clothes是定语从句，修饰the pool，在答句的后面省略了that I learned to swim。如：
—He got his first book published. It turned out to be a best-seller.
—When was that？
—It was[提供/论文和论文/服务，/] in 2017 when he was still in college（that he got his first book published）.
—他的第一本书出版了，还成了畅销书。
—那是在什么时候？
—在2017年，那时他还在上大学。
即学即练
1. — _______ you called yesterday？
— Tom. Why？
A. Who it is that B. Who is it that
C. Who was it that D. Who it was that
2. Was it on a lonely island _______ he was saved one month after the boat went down？
A. where B. that C. which D. what
3. It is not how much we do but how much love we put into what we do _______ benefits our work most.
A. who B. which C. that D. what
4. 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
5. — Did you meet the famous actress at the stadium？
— No. It was in the supermarket _______ we went shopping last Sunday.
A. which B. that C. there D. where
6. — Is it for two months _______ they have stayed here？
— No，it is only three weeks _______ they arrived here.
A. that；since B. that；when
C. when；that D. since；before
参考答案：1～6 CBCCDA（责任编校/彭益）
请注册登录《高中生》·高考网，掌握常考的特殊句式——
1.《倒装句用法解析》
由于句子结构的需要或强调某一句子成分的需要，我们要根据具体语境对句子进行部分倒装或全部倒装。
（请注册登录gaokao.hnjy.com.cn）
2.《省略句难点释疑》
省略句可同时省掉几个句子成分，被省略的部分一般可以在句中补上，但有时省略结构已经定型，如果把省略部分补上，反而不合乎习惯。
（请注册登录gaokao.hnjy.com.cn）
3.《反义疑问句的回答及特殊情况》
对反义疑问句的回答，无论问题的提法如何，如果事实是肯定的，就用yes，事实是否定的，就用no。要特别注意陈述句部分是否定结构，反义疑问句部分用肯定式提问时，回答yes或no与汉语正好相反。 | 
