John joined the army three years ago.(用since或for改写) 怎么写.

问题描述:

John joined the army three years ago.(用since或for改写) 怎么写.
1个回答 分类:英语 2014-09-20

问题解答:

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John has been in the army for three years.
John has been in the army since three years ago.
 
 
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