Lucy isn't coming th stay with us for the weekend.The guest room___.A.needm't to be cleaned B.doesn't need clearing C.needs not to be cleaned D.needn't cleaning为什么选B
问题描述：
Lucy isn't coming th stay with us for the weekend.The guest room___.
A.needm't to be cleaned
B.doesn't need clearing
C.needs not to be cleaned
D.needn't cleaning
为什么选B
答
因为need是个动词，它的否定式一般不用needn't用don't,或者doesn't.
答
B里的need不作为情态动词,后面跟分词表示被动.
A里的need是情态动词,不能用to be结构.
C里的need如果要否定,应该用doesn't,而不是not to .
D里的need是作为情态动词,后面应该用动词原型.