过去将来时表示在过去将来的某一时间发生的动作或存在的状态。常用于宾语从句中。其结构与一般将来时类似，只需将助动词改为过去式。
am/ is/ are going to + 动词原形→was/ were going to + 动词原形
will + 动词原形→ would + 动词原形
should + 动词原形 → should + 动词原形
例如：
You knew I would come.
He asked me when he would see me again.
Jim said he was going to see his friend the next day.
