You __ clean the room now.You _ do it after supper.

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You ____ clean the room now.You ___ do it after supper.
A.won't,must. B.don't have to,may. C.needn't,must. D.shouldn't,can
为什么选B,其他三个为什么不可以?原因,谢谢!

选A的话是一般将来时,与后面的now冲突,need后面直接加动词是作情态动词的用法,应用于否定句,should是shall的过去式,用于过去时态
再问：是不是B项needn't 也可以，后面的must不合适？
再答： must翻译为必须，带有命令语气，在本题中不适合

You ____ clean the room now.You ___ do it after supper. ——___ we have to clean the room now?Yes,you ____. must i tidy the room now?no ,you（）.you（）do it after breakfa 英语翻译1.Mom,____I clean my room now?NO,you_____.You can do it Your room is very d____ .Can you clean it now? must i clean my room now ?---no, you ___ .but you must clean ----Could you tell me( ----Certainly.After I clean the room, Mary,_____ you ________(clean)the room now? Must I clean the room now No you don't_______ _______ you keep the room clean you may use it -____ I finish my homework now?-No,you ___.You __ do it toni Can I give you a to clean the room?-No,thanks.I can do it by