他们明天要去香港。
I am coming. 我就来。
过去完成时:
过去完成时表示过去某一时刻或某一动作之前完成的动作或所处的状态,过去完成时常和 by , before 等词组成的短语和从句连用。
过去完成时的构成: had + 过去分词
We had already learned two thousands words by the end of last year.
到去年年底我们已经学了2000个单词。
?
When we arrived at the station, they had waited for more than twenty minutes.
我们到达车站的时候,他们已经等了二十多分钟。
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