The building _____(建成)before i left.
需要用完成时 还是 过去式 还是各有意思
i turned off the lights before i left为什么用过去式 i had turned off the lights before i left为什么用完成时 第一个表示过去完成的 第二个表示对现在有影响 那The building _____(建成)before i left。为什么不用过去式
人气：234 ℃ 时间：2020-06-23 15:11:51
解答
用过去完成时的被动语态,因为动作在LEFT之前完成,即 had been built此句改成过去式怎么改The building was built before I left.你是说两句The building was built before I leftThe building had been built before i left都对 各有意思吗如果一定要用过去时,就对,但根据句意用第二句,,即过去完成时更好
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