过去将来进行时 Past Future Continuous

表示在过去的时间看来，将来某一时间点正在进行的动作。

• 结构公式：主语 + would be + doing
• 否定式：主语 + would not be (wouldn't be) + doing
• 疑问式：Would + 主语 + be + doing...?
• I said I would be doing my homework at 8:00 tomorrow. —— 我说过了我明天8点正在做家庭作业。
• She promised that she would be waiting for him at the station. —— 她许诺过她会在车站一直等他。

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