一般将来时的过去时叫过去将来时。
过去将来时的出发点是过去，即从过去某一时刻看以后要发生的动作或状态。
肯定句：
（1）主语+be（was或were）going to+动词原形（v.原)+其它（2）主语+would+动词原形+其它（3）was/were+动词不定式
否定句：
（1）主语+be not（wasn‘t或weren’t）going to+动词原形+其他（2）主语+would not+动词原形 +其它
疑问句：
（1）Be（Was或Were）+主语+going to+动词原形+其它（2）Would+主语+动词原形+其它
I didn't know if he would come.
She told us that she would not go with us，if it rained.
I didn't know how to do it. What would be their ideas
