我们用将来完成进行时态来形容一个行动在未来特定的时间里已进行多久了。
We use the future perfect continuous tense to talk about how long an action will be going on at a future time.
掌握现在时，过去时，未来时， 进行时， 完成时的各种用法。
To grasp the usage of the tenses, including the present, past, future tense and continue, perfect tense.
掌握现在时，过去时，未来时， 进行时， 完成时的各种用法。
To grasp the usage of the tenses, including the present, past, future tense and continue, perfect tense.
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