needn‘t和don't have to解释是什么?怎么用?

问题描述:

needn‘t和don't have to解释是什么?怎么用?

needn't不需要,是对should的否定回答
don't .have. to. 没有必要

一样,不需要.needn't用在否定回答.don't have to用途广泛.