根据提示填空(每空一词)
They were shopping at that time. (改为否定句)
They ____ ____ at that time.

答案

weren’t,shopping

知识点:否定句  动词时态:过去进行时  

解题思路

过去进行时的句子变为否定句时在be动词后加not,答案为weren’t shopping。

易错点

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