After they had arrived campus a girl was sssigned to take them on a tour of the halls
这个地方为什么要用 过去 完成时
人气：192 ℃ 时间：2020-04-08 23:01:37
解答
因为这个动作是发生在girl was sssigned to take them on a tour of the halls之前的.因为girl的动作用的是过去时,过去的过去就用过去完成时.我们老师教我们,看这个动作和主语发生的动作有没有时间差、如果有时间差,...
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