19.----Must I take a bus to your home ----No, you_______. It's just about 5 minutes’ walkfrom here A .must not B.don't have to C.shouldn't D.don't need 为什么不能是D

19.----Must I take a bus to your home ----No, you_______. It's just about 5 minutes’ walk
from here A .must not B.don't have to C.shouldn't D.don't need
为什么不能是D

B
D选项可以说成needn't ,因为问句用的是情态动词,must,回答时否定回答只能是：don't have to 或 needn't .

确定选项没错吗？ 应该是 needn't， 但是没有这个选项的话，可以选B

B回答must的提问，否定用needn't或B的形式。

语法就是这样规定的呀，must的一般疑问句，如果是否定回答的话，是you needn't，不是don't need

D 改成 needn‘t 就对了

答案是不是B？

need做情态动词时，否定为needn't。做实义动词时，否定为don't/doesn't need，在这里是情态动词，所以D是错的 若用need.应该是needn't

C 用must 提问，否定用don't have to 回答，肯定用must回答D 应该是don't need to.或
needn't .

答案是B吧
如果是D，应该是 No,you don't need to 或者No, you needn't
比如：
----Do you want to go shopping?
----No,i don't
如果再加一点，就是No, i don't want to
再加一点就全了，就是No,i don't want to go shopping.

must提问回答否定只能是needn't