大家好，我是小根根，我来为大家解答以上问题。need not和need not to，needed not还是not needed很多人还不知道，现在让我们一起来看看吧！

1、need

2、可用作情态动词 You needn't talk so loud.

3、可用作行为动词 You didn't need to tell him the news; it just made him sad.

4、It's not needed to wear your shool uniform.

5、need 作行为动词有被动

6、如：He needs me to help him with studies.

7、 I am needed to help him with studies.

8、be needed 有必要 be not needed 没必要

9、there is no need 没必要

本文到此讲解完毕了，希望对大家有帮助。