英语强调句

先看不强调的说法，He didn't go back home after the experiment until midnight.英语的强调句型是：It is(was)...that...，现在用这一句型来强调until midnight这个时间状语，It was not until midnihgt that he went back home after the experiment.这里可以看出两点，一是否定被前置了，二是that之后的句子主谓并不倒装。这一切都是英语的习惯使然。答案A错的原因有两个，一是主谓倒装了，二是没了强调句型必不可少的that。

放在强调句中不必倒装.

只有将not until放在句首采需要用倒装句型.

Not until midnight did he go back home.

It was not him but me that was cheated.

去掉　It was　后，将是一个倒装句，若选Ａ，不符合ＧＲＡＭＭＥＲ．

it is ...that 这样的强调句有一个明显的特点：如果你把it is ...that从句中去掉，原句结构仍完整，即仍是一个独立的句子。这道题也可以去掉：he went back home not until midnight.也就是说，把it is ...that去掉后，原句的语序不变，不用倒装或再次强调。