off+n.构成的短语作形容词的用法

off+n.构成的短语可起形容词的作用,多用作表语,有时也可作定语。请看以下几组短语的用法:1.off duty 下班时间;自由时间Sailors like to go sight-seeing when they are off duty in a foreign port.船停靠外国码头时,不当值的水手都喜欢下船游逛。The bank robber was captured by an off-duty policeman.银行窃匪被一名非值勤的警察所逮捕。2.off balance 不平衡;预料之外的事Never stand up in a canoe;it will get off balance and turn over.