1、do without 2、have no use for 3、with no need for 4、needn't
【need 】
1、v.需要;必需 。
If the ground is too dry, then you need to water it.
如果地面太干燥,那么你就需要给它浇浇水。
You need some warm clothes for the winter.
冬天来了,你必需准备一些保暖衣物。
I need to spend more time studying.
我必需花更多时间来学习。
2、n.需要;必要;缺乏 。
You look tired. You need a good rest.
你看来累了。你需要好好休息一下。
If I need you to come and help, I'll call you.
如果我需要你来帮忙,我会打电话的。
The doctor told me I was in need of a good rest.
医生对我说,我需要好好休息。
I feel a need to talk to you about it.
我觉得有必要跟你谈谈那件事。
There isn't much need for further research.
没有多大必要进行进一步研究。
We are collecting money for children in need.
我们在为贫困儿童募捐。
My neighbors helped me a lot in my time of need.
我的邻居在我缺衣少食的日子里帮了我很多忙。
3、aux.需要,必须(无时态、人称变化,后与不带 to 的动词不定式连用,多用于疑问句和否定句)