have done for/since和have been doing for/since区别

题目

have done for/since和have been doing for/since区别
i have lived in us for 2 months
i have been living in us for 2 months
i have lived in us since 2 months ago
i have been living in us since 2 months ago
小弟实在是没财富 只能说声谢谢

答案

have done for/since和have been doing for/since完成时,表示动作结束了||||完成进行时,动作还在继续.i have lived in U.S.for 2 months 我已经住在美国2个月,说话时为止有两个月.i have been living in U.S.for 2 m...