Question

you （ ）to the meeting this afternoon if you have something to do

A needn't to come
B don't need come
C don't need coming
D needn't come
求原因

Answer 1

选D 主要考察need的实意动词和助动词
a,d,是助动动词 而a的用法错了
bc应为don't need to come

Answer 2

D needn't come
两种形式
实义don't/doesn't need to do

情态needn't do
不懂请追问

Answer 3

D need和dare即可是实义动词，也可是情态动词
当它们为情态动词时，dare/need +（not）+ 动词原形
当它们为实义动词时，(don't/doesn't)+dare/need+to+动词原形
例如：I need a dictionary, so I need to go to the bookstore.
（前者是情态动词，后者是实义动词）

Answer 4

D needn't come
don't need to do sth/needn't do sth为正确表达