结构区别
1.过去进行时的构成:主语+was/were+v-ing形式。当主语为单数时,助动词用was,其余情况下都用were.(v-ing形式为“动词的ing形式”的简写形式。)
2.一般过去时结构的构成:主语+v-ed形式。(v-ed为动词的“一般过去时”的简写形式。)
表示主语的行为区别
有时过去进行时可以用来替换一般过去时,但一般过去时表示主语的行为是经过认真考虑的;而过去进行时表示一种较随便或没有进行仔细考虑的行为。如:
I thought that he would agree with us。我原以为它会同意我们的。
I was thinking of persuading him to follow my advice。我想到了要说服他接受我们的建议。
1、He said he would wait until they came back.
他说他会等到他们回来。
2、He was here just now.
他刚才还在这里。
3、What did you do yesterday?
你昨天做了什么事?
4、We often played together when we were children.
我们小时候常在一起玩。
5、He used to smoke a lot, but he doesn’t now.
他过去经常抽烟,但现在不抽了。