英語語法入門之過去時(shí)態(tài)
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There are two tenses in English – past and present.
英語里有兩種時(shí)態(tài)—過去時(shí)和現(xiàn)在時(shí)。
The past tense in English is used:
英語里過去時(shí)用于：
to talk about the past
談?wù)撨^去
to talk about hypotheses – things that are imagined rather than true.
談?wù)摷僭O(shè)
for politeness.
基于禮貌
There are four past tense forms in English:
We use these forms:
to talk about the past:
He worked at McDonald’s. He had worked there since July.
He was working at McDonald’s. He had been working since July.
to refer to the present or future in conditions:
He could get a new job if he really tried.
If Jack was playing they would probably win.
and hypotheses:
It might be dangerous. Suppose they got lost.
I would always help someone who really needed help.
and wishes:
I wish it wasn’t so cold.
In conditions, hypotheses and wishes, if we want to talk about the past, we always use the past perfect:
在條件狀語從句、虛擬語氣以及表祝愿時(shí)，我們?cè)谡務(wù)撨^去時(shí)，經(jīng)常使用過去完成時(shí)。
I would have helped him if he had asked.
It was very dangerous, What if you had got lost?
I wish I hadn’t spent so much money last month.
We can use the past forms to talk about the present in a few polite expressions:
在一些禮貌的表達(dá)中，我們用過去式來談?wù)摤F(xiàn)在的事情。
Excuse me, I was wondering if this was the train for York.
I just hoped you would be able to help me.
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