警告的英文为warn。warn作为动词，可作及物动词，也可作不及物动词，基本含义除了“警告”之外，还有“提醒注意”、“使警惕”、“告诫”等意思，固定搭配为warn sb of /about/against sth。
warn的中文含义及用法介绍
warn作为动词，意为提醒注意(可能发生的事);使警惕;劝告(使有所防备);警告;告诫。例句有：
1、I tried to warn him, but he wouldn't listen.
我设法提醒过他，可他就是不听。
2、He warned us against pickpockets.
他提醒我们要提防小偷。
3、I had been warned what to expect.
有人事先告诉过我要出什么事。
4、He warned Billy to keep away from his daughter.
他警告比利离他女儿远点。
5、The referee warned him for dangerous play.
裁判警告他有危险动作。
6、When I had my first baby friends warned me that children were expensive...
当我有了第一个孩子时，朋友们提醒我说养孩子是很花钱的。
7、Mrs. Blount warned me not to interfere...
布朗特夫人警告我不要插手。
8、These figures should come with a government health warning.
这些数字须附以谨慎对待的警告。
9、Chest pains can be a warning signal of heart problems.
胸部疼痛可能是心脏病的报警信号。
10、People were swimming in the ocean despite the hurricane warning.
尽管有飓风警报，人们仍然在大海里游泳。
11、Doctors issued a warning against eating any fish caught in the river.
医生发出警告不要吃在那条河里捕的鱼。
12、If I had noticed the warning signs, none of this would have happened.
如果我注意到了那些预警征兆，这种事就一桩也不会发生了。
