1.want sb to do sth 否定形式?
问题描述：
1.want sb to do sth 否定形式?
2.help sb do sth 的否定形式又 是什么?
3.
好像动词不定式否定 是 在不定式之前加not,构成not to do sth.
如：tell sb not to do sth
但 want to do sth 就是直接用 don't want to do sth
怎么回事?
答
want to do sth 直接用 don't want to do sth 这里的不定式是做宾语的tell sb not to do sth 这里的不定式是做宾语补足语的!结构不同.实例：I don't want to do that.I want him not to do that.当然第二句也...