-Have you finished your homework,Lucy?- No,I ____my mother i

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-Have you finished your homework,Lucy?- No,I ____my mother in the kitchen all day yesterday
答案上说是一整天干的事,用过去进行时.还是有点不太懂,
答案是was helping

是对过去一整天的状态的描述
用过去进行时,表示在过去的某段时间一直在做某事.
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再问：十分感谢！你可以再举一些例子吗，关于过去进行时的。谢谢！
再答： I was writing a novel last month. 上个月我一直在写一部小说

-Have you finished your homework,Lucy?- No,I ____my mother i Hi,Lucy.have you finished your homework yet?NO,just half.I a Have you finished your homework yet NO,not yet,I think it'll -Have you handed in your homework __?-No,I haven't finished Have you finished your homework?No,not yet.I think it'll tak 关于代词的选择题1.-Have you finished your physics homework yet?-No,I Have you finished your homework yet?No,but I ____ (doing) it Have you finished your homework yet?I asked Tom "Have you finished your homework?"the teacher asked Lucy.转变成 —Hi, Lucy. Have you finished your homework yet? I have\hadHave\had you finished homework?finished homework.( -Have you finished your homework ___?-Yes.I have finished it