Need 的用法

n.
1. 需要;必要;需求;要求[S][(+of/for)][+to-v]
We have no need to be afraid of them.
我们不必怕他们。
2. 必要之物;需求[P1]
3. 贫穷;困窘;危急[U]
My neighbors helped me in my time of need.
我的邻居在我困难的日子帮了我忙。
vt.
1. 需要,有...必要[W][+to-v][+v-ing][O2][O4][O7]
The garden needs watering.
花园该浇水了。
I don't think you need to worry about this.
我认为你不必为这事担心。
They need our help.
他们需要我们帮助。
vi.
1. 生活穷困
v.aux.
1. (多用于疑问句和否定句)需要,必须
Need you go so soon?
你需要这么早走吗 ?
You needn't trouble about that.
你不必为这费事了。

I got up early，but I ____ so，because I had no work to do that morning．

A．needn't do B．needn't have done

C．didn't need do D．didn't need to do

此题应选B。为了弄清此题，首先我们要知道need有情态动词和实义动词两种用法。一般说来，这两种用法在意思上没有什么差别，只是用法差别较大：

他必须去那儿吗？

正：Need he go there？（need为情态动词）

正：Does he nee