填空题!WhatneedI?答案是填“do”,为什么不能填“todo”呢?不是“needtodo”的吗?

Question

填空题!What need I _____?
答案是填“do”,为什么不能填“to do”呢?不是“need to do”的吗?

Answer 1

need 有三种词性
名词 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.
及物动词 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.
不及物动词 vi.
1.生活穷困
助词 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.
这里need为助词,和could 的用法差不多.