needn't do sth和don't have to do sth的用法一样吗?
don't need to do sth和don't have to do sth又有什么关联
need和have的用法:
need表示需要,主要用于否定句和疑问句。用于疑问句,肯定回答用must,否定回答用needn’t。have to表示他人或客观情况要求”必须”,也可以翻译为”不得不”,have to否定形式意思是”不一定”或”没有必要。
造句:
1、I need to make a phone call.我需要打个电话。
2、I need you to do something for me.我需要你为我做些事。
3、They may have to amputate. 他们可能不得不施行截肢手术。
4、I have to finish this essay today. We have to hand them in tomorrow. 我今天得完成这篇论文,因为我们明天必须交。