现在完成时中的for和since有何区别举例加

如题所述

第1个回答  2019-01-19

现在完成时中since和for的区分

第2个回答  2017-07-30

for+时间段。

He has been in the army for three years.

since+时间点或句子。

He has been in the army since three years ago.

They haven't seen each other since he left three years ago.

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第3个回答  2017-07-30
for +时间段
since +时间点追答

如:

He has lived here since three years ago.