don't need to

don't need to YOU don't need to ``````` you don't need to don't need to understand don't need to 和needn't you don't need to be You don't need to pretend don't need to等于什么 I don t need to know You don't need to understand it. YOU DON'T KNOW AND DON'T NEED TO don"t need和don't have to 的区别?