1、warn sb. (not) to do sth. 提醒(警告)某人(不)做某事 有时也可以用下面的结构表达: warn sb. of sth. He has been warned of danger of driving after drinking wine. 他已被提醒过酒后开车危险。
2、 warn sb. about / against sb. / sth. 或 warn sb. against doing sth. 提醒某人/警告某人不要做某事。
3、例: He warned us about the serious situation. 他提醒我们形式的严峻。
4、 They warned him against swimming in that river. 他们警告他不要到那个河里游泳。
5、 用法: warn sb. to sth. warn sb. of sth. warn sb. that… Note: warn sb. not to do sth.=warn sb. against doing sth.
