高中英语it用法归纳:强调it
19. It is + 被强调部分 + that ...
该句型是强调句型。将被强调的部分放在前面,其它部分置于that 之后。被强调部分可以是主语,宾语,表语或状语。强调的主语如果是人,that 可以由 who 换用。如果把这种句型结构划掉后,应该是一个完整无缺的句子。这也是判断强调句型与其它从句的方法。
It was about 600 years ago that the first clock with a face and an hour hand was made.
It was they that (who ) cleaned the classroom yesterday.
It was in the street that I met her father.
20. It is not until + 被强调部分 + that ...
该句型也是强调句型。主要用于强凋时间状语,译成汉语 直到才,可以说是 not ... until ... 的强调形式。
It was not until she took off her dark glasses that I realized she was a famous film star.
= Not until she took off her dark glasses did I realize she was a famous film star.
= I didnt realize she was a famous film star until she took off her dark glasses.
注意:
1)一般强调时间不能用when, 强调地点不用where;
2)强调句子谓语不能使用此句型,应使用助动词的适当形式。
3)在强调until引导的状语时,如果在句中有not,not要提前
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2016-02-29
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