过去将来时的构成:
一、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
二、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
三、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
四、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)