本站原创
高中英语教科书中强调句出现的特别多，强调句只是强调句子的某一成分（通常是主语、宾语、或状语），人们用强调句来表达自己的意愿或情感，这个语法知识既是重点又是难点，学生不容易理解和运用强调句，下面我对这个知识点归纳一下：
1 强调陈述句：“ Itis/was+被强调部分+that/who+原句其他部分”来强调说话人的愿意。如：
原句：ImetMr. Zhang in the school library yesterday.
强调主语：It was I that/who met Mr. Zhang in the school library yesterday.
强调宾语：It was Mr. Zhang that/whom I met in the school library yesterday.
强调地点状语：It was in the school library that ImetMr. Zhang yesterday.
强调时间状语：It was yesterday that ImetMr. Zhang in the school library.
注意：
（1）在强调主语时，that 后的谓语动词要与被强调者保持人称和数的一致。如：
It is I who am a student.
（2）强调状语时，连接词只能用that,无论被强调部分是表示地点还是表示时间意义的名词，都不可以用where或者when。
强调人时，可以用who/that(在从句中作主语)或whom/that(在从句中作宾语)。
（3）原句的谓语动词时态是一般过去时，过去进行时和过去完成时，用It was…,其他时态用It is…。
（4）对“…not … until… ”这个句型进行强调时，一般使用“ Itis/was…not … until…that…”这一句型进行强调。如：
原句：My mother didn''t come home until 12 o''clock last night.
强调句：It was not until 12 o''clock last night that my mother came home.
原句：I didn’t realize she was a famous singer until she took off her dark glasses.
强调句：It was not until she took off her dark glasses that I realized she was a famoussinger.
2强调句的一般疑问句型：”Is/Was+it+被强调部分+that/who/whom+原句其他部分?”如：
原句：Did you meet Mr. Zhang in the school library yesterday ?
强调主语：Was it you that/who/ met Mr. Zhang in the school library yesterday ?
强调宾语：Was it Mr. Zhang that/whom you met in the school library yesterday ?
强调地点状语：Was it in the school library that you metMr. Zhang yesterday?
强调时间状语：Was it yesterday that you metMr. Zhang in the school library?
3强调句的特殊疑问句型：特殊疑问词+is/was+it + that…如：
原句：When did he make up his mind to lee his county ？
强调句：When was it that he made up his mind to lee his county ？
4强调句的特殊疑问句型如果用在宾语从句时，要把Be动词和it的顺序换成陈述句的顺序。如：
原句： I was wondering who would teach us English the next term.。
强调句：I was wondering who it was that/ who would teach us English the next term
5强调谓语：Itis/was …+that…结构不能强调谓语，如果要强调谓语时，用助动词do,did 或者does放于动词原形前面。句子可以被翻译为：务必，的确，确实，一定等等。如：
Do come this evening。
今天晚上务必要来。
6有关强调句型的一些说明：
（1）强调句型的结构不难掌握，要想准确地使用它，必须明确一点：去掉Itis/was …+that…结构后不会对句子的完整性造成影响。这也是区分它与其他句子的一个重要标志。
（2）强调句型容易与主语从句，状语从句和定语从句混淆。
如： 强调句型跟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 wrong.
That he’swrong is very clear.
7特别注意下面两个句子that和when的用法。
（1）ItwasDec.18thwhenshewasborn .
(这一句是时间状语从句)
（2）Itwason18thhatshewasborn .
(这一句是强调句)
8补充说明
（1）并不是所有的句子都能用强调句来强调，像条件状语从句，让步状语从句以及由as/since引导的
（2）我们还可以用形容词very,only,single,副词such ever,never,just等来表示强调。如：
At that very monent he heard a cry for help.
I can neven remember the name of that old friend of mine.
Not a single person has been in the classroom this afternoon．
You are the only person here who can speak French．
This is just what I needed.
（3）用介词短语 in the world,on earth, at all等等进行强调。如：
等来加强疑问或否定语气。如：
Where in the world did you go just now ?
What on earth are you doing?
The boy is not at all fit for the post.
有些还可以用感叹句，重复，倒装，破折号，黑体字进行强调，加强语气，这里就不一一阐述了。
1 强调陈述句：“ Itis/was+被强调部分+that/who+原句其他部分”来强调说话人的愿意。如：
原句：ImetMr. Zhang in the school library yesterday.
强调主语：It was I that/who met Mr. Zhang in the school library yesterday.
强调宾语：It was Mr. Zhang that/whom I met in the school library yesterday.
强调地点状语：It was in the school library that ImetMr. Zhang yesterday.
强调时间状语：It was yesterday that ImetMr. Zhang in the school library.
注意：
（1）在强调主语时，that 后的谓语动词要与被强调者保持人称和数的一致。如：
It is I who am a student.
（2）强调状语时，连接词只能用that,无论被强调部分是表示地点还是表示时间意义的名词，都不可以用where或者when。
强调人时，可以用who/that(在从句中作主语)或whom/that(在从句中作宾语)。
（3）原句的谓语动词时态是一般过去时，过去进行时和过去完成时，用It was…,其他时态用It is…。
（4）对“…not … until… ”这个句型进行强调时，一般使用“ Itis/was…not … until…that…”这一句型进行强调。如：
原句：My mother didn''t come home until 12 o''clock last night.
强调句：It was not until 12 o''clock last night that my mother came home.
原句：I didn’t realize she was a famous singer until she took off her dark glasses.
强调句：It was not until she took off her dark glasses that I realized she was a famoussinger.
2强调句的一般疑问句型：”Is/Was+it+被强调部分+that/who/whom+原句其他部分?”如：
原句：Did you meet Mr. Zhang in the school library yesterday ?
强调主语：Was it you that/who/ met Mr. Zhang in the school library yesterday ?
强调宾语：Was it Mr. Zhang that/whom you met in the school library yesterday ?
强调地点状语：Was it in the school library that you metMr. Zhang yesterday?
强调时间状语：Was it yesterday that you metMr. Zhang in the school library?
3强调句的特殊疑问句型：特殊疑问词+is/was+it + that…如：
原句：When did he make up his mind to lee his county ？
强调句：When was it that he made up his mind to lee his county ？
4强调句的特殊疑问句型如果用在宾语从句时，要把Be动词和it的顺序换成陈述句的顺序。如：
原句： I was wondering who would teach us English the next term.。
强调句：I was wondering who it was that/ who would teach us English the next term
5强调谓语：Itis/was …+that…结构不能强调谓语，如果要强调谓语时，用助动词do,did 或者does放于动词原形前面。句子可以被翻译为：务必，的确，确实，一定等等。如：
Do come this evening。
今天晚上务必要来。
6有关强调句型的一些说明：
（1）强调句型的结构不难掌握，要想准确地使用它，必须明确一点：去掉Itis/was …+that…结构后不会对句子的完整性造成影响。这也是区分它与其他句子的一个重要标志。
（2）强调句型容易与主语从句，状语从句和定语从句混淆。
如： 强调句型跟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 wrong.
That he’swrong is very clear.
7特别注意下面两个句子that和when的用法。
（1）ItwasDec.18thwhenshewasborn .
(这一句是时间状语从句)
（2）Itwason18thhatshewasborn .
(这一句是强调句)
8补充说明
（1）并不是所有的句子都能用强调句来强调，像条件状语从句，让步状语从句以及由as/since引导的
摘自：毕业论文任务书www.udooo.com
原因状语从句等等就不能用强调句来强调。如：If it rains,we will not go out.就不能强调为：ItisIfitrainsthatwewillnotgoout。（2）我们还可以用形容词very,only,single,副词such ever,never,just等来表示强调。如：
At that very monent he heard a cry for help.
I can neven remember the name of that old friend of mine.
Not a single person has been in the classroom this afternoon．
You are the only person here who can speak French．
This is just what I needed.
（3）用介词短语 in the world,on earth, at all等等进行强调。如：
等来加强疑问或否定语气。如：
Where in the world did you go just now ?
What on earth are you doing?
The boy is not at all fit for the post.
有些还可以用感叹句，重复，倒装，破折号，黑体字进行强调，加强语气，这里就不一一阐述了。