not后面是加do还是doing完全取决于前面的时态或者时态动词。比如:这是根据时态:1.idonothateyou.(not+do)2.heisnotwritingthehomeworkbutwatchingtv.(notdoing)下面是根据前面动词:1.hemakesthedognotbeselt.(not+do)2.iseethegirlnotcryingunderthetree.(not+doing)