指代时间、距离、自然现象等
例句:
It’s a lovely day isn’t it?
It was very cold today.
It’s a long way to go.
What time is it ? It’ s half past eleven.
指代前面所提到的人或事物,或指代说话双方都熟悉的人、婴儿等。
例句:
Who is knocking at the door?
It’s me.
Sorry I am late again . It doesn’t matter.
Thank you. Don’t mention it.
3) 作形式主语或形式宾语,而把真正的主语或宾语放在后面,真正的主语或宾语往往是从句,动名词、不定式等。例如:
例句:
He found it not easy to learn a foreign language well.
We think it no good reading in bed.
I think it necessary that we have a meeting.
It is said that all of them have gone to the cinema.
It is no use trying to persuade him.
It is well-known that China has the largest population in the world.
4) it 用于虚指,尤其是表示喜好、憎恶的动词,如;enjoy, like, love, dislike, hate,
see to后,即这些动词后面的宾语从句前要加 it.
例句:
I hate it when people speak with their mouth full.
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2017-04-24
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