Question

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

答案是C。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？

Answer 1

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）

Answer 2

all day 整天 应该用过去进行时

Answer 3

She said that she_all day last Saturday. A. worked B. would work当然是C，表示上周六一天都在工作，而B表示过去将来时。 C表示过去一段

Answer 4

答案是A，不用我多说，我想你也明白的。你肯定看错参考答案了！