问题描述:
I didn't go to bed until my father came back.came back可以用had been back吗?本人对时态很混乱
还有如题,他在过去的那段时间已经回来了,能否用had been back?
还有如题,他在过去的那段时间已经回来了,能否用had been back?
问题解答:
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