重庆2004年中考题目：
27. You ______ to the meeting this afternoon if you have something important to do.
A. needn’t to come B. don’t need come
C. don’t need coming D. needn’t come
首先我们要知道need做动词时有两个意思：
1. must have
need something，need to do something，need object to do something。
这种情况的否定是 doesn't/don't/didn't need something or anything/to do something or anything/object to do something or anything
2. must do
need to do something，need do something
这种情况的否定是needn't do something/anything
以下是must do意思内不同的否定方式：
这样这道题目很明显为选项D