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Look at the sign!It says No Smoking.You____smoke here填shouldn't还是mustn't
人气:193 ℃ 时间:2020-01-25 03:29:04
解答
mustn't 表示禁止,语气很强烈
shouldn't 更多用于虚拟语气句等中,也是will的否定,意思为不应该
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