you （ ）to the meeting this afternoon if you have something to do
问题描述：
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
答
D needn't come
两种形式
实义don't/doesn't need to do
情态needn't do