warn：

　　v. 提醒注意(可能發(fā)生的事);使警惕;勸告(使有所防備);警告;告誡

　　第三人稱單數(shù)： warns

　　現(xiàn)在分詞： warning

　　過去式： warned

　　過去分詞： warned

　　例句：

　　The computer is programmed to warn users before information is d.

　　這臺(tái)計(jì)算機(jī)編程時(shí)已設(shè)計(jì)在信息刪除前提醒用戶。

　　People were swimming in the ocean despite the hurricane warning.

　　盡管有颶風(fēng)警報(bào)，人們?nèi)匀辉诖蠛＠镉斡尽?/p>

　　She was warned that if she did it again she would lose her job.

　　她被警告說如果她再這樣做就會(huì)丟掉工作。

　　He called out a warning from the kitchen.

　　他在廚房里大聲發(fā)出警告。

　　She had ignored the warning signs of trouble ahead.

　　她沒有理會(huì)警示前方危險(xiǎn)的標(biāo)志。

　　Doctors issued a warning against eating any fish caught in the river.

　　醫(yī)生發(fā)出警告不要吃在那條河里捕的魚。