no ,never,not ,neither,nor ,too...to..,hardly ,scarely ,seldom,little,few,rarely
以及no开头的nowhere,nothing ,nobody 等词汇
by no means,等词组,
***但：think,believe,suppose,imagine,expect等动词后接宾语从句,如果含有not的否定句,那么应将否定移到主句.
例如：I don't think the party is very good,is it?