Learn A Word: Imperative
	文章来源: 冲浪潜水员 于 2014-06-27 23:29:55

Imperative is both an adjective and a noun. There is also an "imperative mood" in grammar. If you know these already, great! Otherwise, here is a link to look it up: http://en.wiktionary.org/wiki/imperative  S.D 2014.6.27