周一之前他们准备不完。
They won't have done all the preparation by Monday.
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won't英 /wəʊnt/|美 /woʊnt/
done英 /dʌn/|美 /dʌn/
解释
won't have done 是将来完成时的否定缩略形式，表示到将来时间点「周一」仍未完成的准备工作。
They won't have done all the preparation by Monday.
won't have done 是将来完成时的否定缩略形式，表示到将来时间点「周一」仍未完成的准备工作。