语法：过去将来时

概念:表示在过去将来的某一时间发生的动作或存在的状态.

构成:

1) 主语(第一人称) + 助动词should + 动原 +…

2) 主语 + would + 动原 + ….

3) 主语 + was/ were going to +动原…

用法:

过去将来时除了上下文暗示外,一般常用在间接引语中,主句谓语动词为过去时态.

如:

1) I should go.

2) You knew I would come.

3) They were going to Nanjing.