这些名词均含有“行为，举止”之意。
behavior : 普通用词，侧重指某人在特定场合对他人或在他人面前的行为、举止。
- His behavior was called provocative and antisocial.
他的行为被认为是煽动性的和反社会的。 - Alcohol can produce violent, disruptive behavior.
酒精会引发暴力和破坏性行为。
conduct : 较正式用词，泛指某人的行动。侧重根据社会道德标准和责任感。.
- The sport has a strict code of conduct.
体育运动有严格的行为规范。 - For Europeans, the law is a statement of basic principles of civilised conduct.
对于欧洲人来说，法律是对基本文明行为准则的表述。
manner : 主要用来指人的习惯行为。
- It is bad manners to talk with your mouth full.
嘴里塞满了东西跟人说话是不礼貌的。 - His manner was polite but cool.
他举止彬彬有礼而又冷漠。
