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She said that she________all day last Saturday.A.worked B.wo

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She said that she________all day last Saturday.A.worked B.would work C.was working D.had worked
She said that she________all day last Saturday.
A.worked B.would work C.was working D.had worked
那A为什么不对呢?
也有这种说法:It rained all day last Saturday.
Mary stayed at home all day last Saturday.
这道题为什么不选A呢?
She said that she________all day last Saturday.A.worked B.wo
表示过去某段时间正在进行的动作.
Shirley was writing a book about China last year but I don't know whether she has finished it.舍利去年在写一本有关中国的书,但我不知道他是否完成.
They were building a dam last winter.去年冬天他们在建大坝.
一般过去时与过去进行时用法比较
一般过去时表示在过去某个时间发生的动作或存在的状态(强调一次性动作);而过去进行时则表示在过去某一时刻或某段时间正在进行的动作(强调反复的动作).
Mary wrote a letter to her friend last night.玛丽昨晚给她的朋友写了封信.(写完了)
Mary was writing a letter to her friend last night.玛丽昨晚一直在给她的朋友写信.(不一定写完)
We built a bridge last winter.去年冬天我们修了一座桥.(建成了)
We were building a bridge last winter.去年冬于我们在修一座桥.(一直在修,不涉及结果)