一、过去将来时的结构

should/would+动词原形

二、过去将来时用法、定义详细讲解

1、表示从过去某时看来将要发生的动作或存在状态。

例句：

He said that he would wait for us at the bus stop.他说他要在车站等我们的。

She hoped that they would meet again someday.她希望将来有一天他们能再见面。

2、表示过去的某种习惯性行为，只用would。

例句：

Whenever we had trouble,he would come to help us.每当我们遇到困难时，他总会给予帮助。

3、表示过去将来时的几种结构。

1)was/were going to do这种结构表示准备、计划做某事，或将要发生某事。

例句：

She was not going to do anything that evening.那天晚上她不准备做任何事。

When they arrived the plane was just going to take off.飞机正要起飞时他们到了。

2)was/were about to do这种结构表示“正要、即将”。

例句：

He was about to be transferred to a seaside town.他正要被调往一座海滨小城。

3)was/were on the point of doing这种结构表示“正要……时”。

例句：

He was on the point of leaving when we came in.我们进来时，他正要动身。

4)was/were due to do这种结构表示“定于(某事做某事)”。

例句：

The ship was due to leave at mid-night.船定于午夜起航。

The talk was due to last for three days.谈话将要进行三天。

5)go,come,leave,take off等少数动词可用过去进行时表示过去将要发生的情况。

例句：

A lot of people were coming to watch the fireworks.有许多人要来观看焰火。

She told mother that she was going to a dance with Tom.她告诉母亲，她要和汤姆一起去参加一个舞会。

6)was/were to do这种结构表示曾计划做某事，如果计划的事情没有实现，要用不定式完成式。

例句：

She said she was to take up the position.她说她要承担这个职务。

She said she was to have taken up the position,but later changed her mind.她说她本打算承担这个职务的，但是后来改变了主意。