老师讲过,需要做...用need to do sth,而need可以看作是情态动词也可以看作是动词,所以needn't后面必须是do sth.可是我看电视时发现有一句和老师讲的不一样,Need not to know(无需知道).那need究竟有怎样的用法呢?可以帮我分析一下needn't do sth和needn't to do sth这两者的区别吗?
1. 你老师讲得没错.情态动词: need (not) do sth行为动词: need sth/sb
need to do sth
need sb to do sth
sth need doing=sth need to be done名词:
there be no need for/of sth
there be no need (for sb) to do sth
in need (of...)2. 否定形式应该是 needn't do sth而need not to do sth也是有的(但不能缩写成nee
