过去将来时的结构是:主语+be(was或were)going to+动词原形。一般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

被动语态(1).would + be + 动词的过去分词(done)
(2).was / were +going to be + 动词的过去分词.(done)

1.同一般将来时不一样,把动词be变为过去式,把will,shall变为过去式。

例句:

I didn't know if he would come.
我不知道他是否会来。

She was sixty-six. In three years,she would be sixty-nine.
她66岁了。三年后,她是69岁。

She told us that she would not go with us,if it rained.
她告诉我们,如果下雨的话,她就不和我们一起去了。

I didn't know how to do it. What would be their ideas?
我不知道该怎么办,他们会有什么想法呢?

2.过去将来时常可用来表示过去习惯性的动作。此时,不管什么人称,一律用would。

过去将来时有时可带时间状语
注意
1"was/were going to + 动原"或"was/were +动词不定式完成式"可表示未能实现的过去将来时间的动作。

2was/were about to do
"was/were about to do"表示说话的瞬间就会发生的动作。

3was/were on the point of doing
提示"be about to do" 和 "be on the point of doing"结构一般不与表示将来的时间状语连用,但后面可以接when引导的分句。