材料的绝缘强度表:Shan't / shouldn't ?

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/14 08:04:45
We needn't get ready yet;the guest ______ come for another hour.
A.shan't
B.shouldn't
最好再归纳一下它们的用法与区别!

A 表示将来 B 的语气不对