赖世雄教你学英语语法
副词
3-14:not要置于不定式短语专分词及动名词之前
例：Since I have much work to do, I decide not to go on a trip.(O)
（由于有很多事要办，我决定不去旅行。）
He pretended to not know me.(X)
He pretended not to know me.(O)
（他假装不认识我。）
Having not finished the work, I decided to stay.(X)
Not having finished the work, I decided to stay.
（工作没完成，我决定留下来。）
He is disappointed at not having finished the work.
（他很失望没把工作完成。）