3、过去进行时表示过去将来的动作。现在进行时可以表示将来的动作，同样，过去进行时也可以表示从过去某时间看将来要发生的动作。

　例：He went to see Xiao Li. He was leaving early the next morning.

　他去看小李。他第二天一早就要离开此地了。

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2、when 和while 的用法

　(1)I fell and hurt myself while I _____tennis.

　A. was playing B. am playing C. play D. played

　(答案：A。连接词when 表示时间上的点，其所引导的句子用过去时，while 表示持续的一段时间，其所引导的句子用过去进行时。)

　(2)When you _____ this over with her, you should not see her any more.

　A. talk B. talked C. will talk D. talking

　(答案为B)

　(3)One of the guards _____ when the general came in, which made him very angry.

　A. has slept B. were sleeping C, slept D. was sleeping

(答案为D)

1、表示在过去某一段时间正在进行的动作。常需用表示过去的时间状语或通过上下文来判断时间。

　例：He was doing his homework from seven to nine last night.

　昨天晚上七点到九点他正在做作业。

2、表示现阶段正在进行的动作，但此刻并不一定在进行。

　例：I am attending a conference in Beijing. 我正在北京参加一个会议。

1、表示此时此刻(说话时)正在进行的动作。

　例：The teacher is talking with his students. 这位老师正在同他的学生交谈。

　表示在过去预计将要发生的动作，常用于宾语从句。

　例：He wanted to know when the conference would start.

　他想知道会议何时开始。

6、某些表示开始、终结、往来行动的动词如：go ,come, start, arrive， leave 等的现在进行时可表示将来。

　(1)We are leaving for Beijing tomorrow. 我们明天动身去北京。

　(2)The foreign guests are arriving in Jinan tonight. 外宾今晚到达济南。

5、例：The lecture is about to begin.讲座即将开始。

4、be about to +动词原形：表示即将发生的动作。

3、be to +动词原形： 表示安排或计划好了的动作。

　例：The Third-Ring Road is to be open to traffic before National Day.

　三环路将在国庆节前通车。