I'll help you,so you needn't worry about your eaxm.为什么要用needn't,不用need't to

问题描述:

I'll help you,so you needn't worry about your eaxm.为什么要用needn't,不用need't to

不能用 needn't to .
因为本句中的 need 是情态动词,后面跟动词原形
当 need 作实意动词时,应该是 :
so you don't need to worry about ……