you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
good / appropriate; proper / all right! / (before a verb) easy to / (before a verb) good to / (before an adjective for exclamatory effect) so / (verb complement indicating completion) / (of two people) close; on intimate terms / (after a personal pronoun) hello