We use the pastperfectcontinuous tense to show that an action started in the past and continued up until another time in the past.
我们用过去完成进行时态来形容一个在过去开始的行动,这个行动持续到过去的另一个时间。
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There are three kinds of shapes of the tenses in the Utopia Novels of the later Qing Dynasty: the future past tense, the future perfect tense and the future continuous tense.