用could提问,用什么回答。用must提问,用什么回答。用may提问用什么回答

should能提问吗,如果能用什么回答

Could:肯定:Yes, you can 否定:No,you can't/mustn't(mustn't语气稍强烈)
Must:肯定:Yes, you must/have to 否定:No,you needn't/don't have to(一定不用mustn't)
May:肯定:同could(也和can一样,只是提问时三者语气委婉程度不同)
Should:肯定:Yes, you should/must/have to (后二者语气强硬,有命令意味) 否定:No, you shouldn't/can't/mustn't(后二者有禁止之意)
(望采纳)
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