过去将来时

一、构成：

1） 肯定形式：S+助动词 should/would/was/were going to+动词原形+O.
2） 否定形式：S+助动词should/would not/was/were not going to+动词原形+O.
3） 疑问形式：助动词Should/Would +S.+动词原形+O./ Was/Were + S. +going to+动原+O.

二、用法：

1） 表示从过去某一段时间看将来发生的动作或存在的状态。常用在宾语从句中，由“would+动原”构成。如：
He said he would buy some fruits for his sister.
He asked when the meeting would end.
2） 表示曾经打算或准备要做的动作，用was/were going to +动原。如：
I thought it was going to rain soon.
They were going to start a new job when I saw them then
3） 瞬间动词go, come, leave, arrive, start等，其过去进行时表示过去按计划即将发生的动作。