They __(not be)at school the day before yesterday.

问题描述:

They __(not be)at school the day before yesterday.

be at sw是在某地的意思,但这里面有个时间标志词the day before yesterday.是前天的意思,所以要用were not。

填 were not ,这里的时态是The day before yesterday ,一般过去时,故用were !

They were not__(not be)at school the day before yesterday.
the day before yesterday前天~用过去时
be at school在校,在上学~
他们前天没有上学~
希望可以帮到你~

were not
请采纳谢谢

weren't
yesterday 昨天,故用一般过去时; 主语是THEY ,故BE 用WERE,否定形式是;WEREN’T .
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weren't
were not
两者皆可