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(By the time) she got to class,the teacher has already started teaching Awhen Bbefore
为什么不能用before?
对不起
应该是 had already started..
人气:467 ℃ 时间:2019-08-18 17:00:37
解答
原来用的By the time是指一个时间点,所以应当用when.before 是一个时间段了.
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