past perfect continuous tense

常见例句

We use the past perfect continuous 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。
The second function of the present perfect continuous tense is to talk about an action that started in the past and it is still happening.
太简单了。我们想说那种正在进行的或者才刚刚停止的动作，就用现在完成进行时时态。
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.
晚清的乌托邦小说在时间构形上通常表现为“将来过去时”、“将来完成时”和“将来进行时”等三种不同面相。