2)“It+情态动词+be+被强调部分+that+…”表示强调：
It must be Mike that is listening to the music.
It might have been John who was in the traffic jam.
It would have been at that time that he went to live in London.
3)“It is/was + not until+被强调部分+that+…”表示强调：
It was not until dark that she realized it was too late to go shopping.、
It is not until the radiant energy falls upon matter that it becomes heat energy.
Who was it that interviewed Betty.
Where was it that you were born?
Could it be at the meeting that I met the，teacher?
He told me that it was because he was ill that they decided to return.
[注]在疑问句中，当宾语是"them"时，强调时应改为"those"
Did the professor regard them such contempt? →
Was it those that the professor regarded with such contempt?
5)对否定句中的某部分强调时，要注意"not"的前移：
6)在“It is/was……”之后可用“肯定+否定”或“否定+肯定”形式，以加强对比含义。
It is you not me who should be blamed.
It wasn\'t a knife but a dagger that I saw under the desk.
It was due to luck rather than judgment that the driver succeeded in avoiding an accident.
(2)助动词“do\'’用作强调
1)用在肯定句或祈使句的谓语动词之前，起加强语气的作用，有“的确，一定”的意思，而且要重读。
Do tell me what happened.
They did work very hard last month
We waited and waited for Betty.Finally Betty did come along.
Cars moved very slowly in the 1920s，but，they did move more quickly than in 1910.
2)和“never/not/little/hardly/scarcely/rarely/seldom/only/well”等词连用放在句首，起加强语气的作用，要求用倒装形式，这时"do或did"不重读。
Not a word did she say during the discussion.
Rarely/Seldom do I get invited into the office alone.
Only in the afternoon did I see her.
