过去将来进行时表示在过去将来某一时间正在发生的动作。它常和表过去将来的时间状语连用，但上下文清楚时，时间状语亦可省略。和将来进行时一样，它也常表计划中的事，不表意愿或打算。
■过去将来进行时有一个特点，就常用在宾语从句(尤其是间接引语)中。如：
I thought you’d be sleeping. 我以为你在睡觉哩。
She said she would be looking after you. 她说她会照顾你的。
He didn’t know when he’d be seeing us again. 他不知道什么时候他会再见到们。
I asked her what she would be doing on Saturday. 我问她星期六干什么。
They moved to the main entrance where the car would be waiting. 他们向大门走去，那辆车会在那里等着。
■过去将来进行时有时也可用在其他从句中，如：
The new name he would be using was Jack Jones. 他将用的新名是杰克?琼斯。
He would pay the rest as he would be leaving France. 其余款项，他将在离开法国时付清。
■过去将来进行时也可用在独立句中，如：
Jack said he had found a job. He would be working as a bartender in Detroit. 杰克说他找到了工作。他将在底特律做酒吧间伙计。
I was excited. Next Wednesday we would be flying to Sydney. 我很兴奋。下星期三我们就会飞往悉尼了。
■注意：过去将来进行时都没有被动语态。