一般过去时的功用:
1) 表示一个没指明具体时间的过去的行动,如:
He worked in that bank for four years. (没说明起始时间,但是现在不在那里工作了)。
They once saw Deng Xiaopin.
Did you ever hear BackStreet Boy sing?
2) 表示在过去特定的时间结束的行动,如:
When did you meet him?
I met him yesterday.
When we lived in Phoenix, we studied at Arizona State University.
Where have you been?
Ive been to the opera.
Did you enjoy it?
3) 表示过去的习惯 :
He always carried an umbrella.
They never drank wine.
时间状语:ago, yesterday, the day before yesterday, last week(year, night, month), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.
Eg
I saw Tom playing football yesterday.
The war broke out 3 years ago.
三、现在完成时
现在完成时的形式:
Have/has done
现在完成时的功用 :
现在完成时可以说成是兼有现在与过去意义的一种复合时态。它与现在有密切联系,如:
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