1、off作介词时，是离开、从…落下、从…去掉、下班的意思，例如，I called him but he ran off. 我喊他，可他跑开了。
2、Off you go! 你走吧！ He's had his beard shaved off. 他把胡子刮掉了。
3、off作副词是离开、远离的意思，例如，She's off to Canada next week. 她下周去加拿大。He drove off at the most incredible speed. 他以令人难以置信的速度开车走了。
4、off作形容词是不新鲜、不礼貌、不能接受的意思，看下面例句，This milk smells off. 这牛奶有馊味了。I'd better eat this cheese before it goes off. 我最好在这块奶酪变质之前吃了它。
