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英语
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My mother ( didn't do ) the housework yesterday .为什么不用wasn't do
人气:463 ℃ 时间:2020-04-29 06:29:37
解答
时间状语是 yesterday ,用一般过去时.
需要加 助动词 did 帮助构成一般过去时的否定句
所以 用 didn't do
was 是be 动词的过去式,后面不能跟动词原形do .
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