alert sb to sth
用"to"引出需要警觉的事物。
They alerted me to the danger.
他们提醒我注意危险。
警告；使警觉；提醒
alerts — third person singular of alert
警告,使警觉；通知；使意识到
To give warning to somebody; to make somebody aware of something.
警告,使警觉
To give warning to.
一般现在时
She alerts the team about the deadline every morning.
她每天早上提醒团队截止日期。
一般过去时
The officer alerted the residents to the danger yesterday.
那名官员昨天提醒居民注意危险。
现在完成时
They have alerted the authorities to the security issue.
他们已经向当局报告了安全问题。
规则动词
The security guard alerted the police about the suspicious package.
保安人员提醒警察注意那个可疑包裹。
用法提示：alerted为动词过去式，表示'使警觉，通知'。
Please alert me if there is any change in the schedule.
如果行程有任何变化，请通知我。
用法提示：alert为动词原形，用于祈使句，表示'通知'。
The report is alerting the public to the dangers of smoking.
这份报告正在提醒公众吸烟的危害。
用法提示：alerting为动词现在分词，表示'使意识到，警告'。
用"to"引出需要警觉的事物。
They alerted me to the danger.
他们提醒我注意危险。
that从句说明具体信息。
We alerted the police that a burglar was in the house.
我们通知警方屋里有个窃贼。
"of"或"about"后接提醒的内容。
Please alert us of any changes.
如有任何变动请通知我们。
grammar · medium
易错句子I am alert you to the danger.
正确表达I alert you to the danger.
错误使用了形容词形式“alert”作为谓语，应使用动词原形“alert”直接作谓语，避免“be动词+形容词”结构。
grammar · medium
易错句子I alerted him about the problem.
正确表达I alerted him to the problem.
动词“alert”后需接介词“to”表示“使某人注意某事”，而非介词“about”。
与形容词‘警觉的’相反，指缺乏警觉或无知觉
与形容词‘警觉的’相反，指完全未意识到周围情况
与形容词‘警觉的’相反，指注意力分散或不够警惕
提醒某人注意某事
The report alerted us to the dangers of cyber attacks.
这份报告提醒我们注意网络攻击的危险。
通知当局
Witnesses alerted the authorities immediately after the accident.
目击者在事故发生后立即通知了当局。
提醒公众
The government alerted the public about the approaching storm.
政府提醒公众注意即将到来的暴风雨。
报警
She alerted the police when she heard strange noises.
她听到奇怪的声音后报了警。
通知某人问题
The team leader alerted the manager about the software issue.
团队领导通知经理软件问题。
通知紧急服务部门
Call 911 to alert the emergency services.
拨打911通知紧急服务部门。
警戒着，提防着
The soldiers were on the alert for any sign of enemy attack.
士兵们警戒着任何敌人进攻的迹象。
发出警报
The guard sounded the alert when he saw smoke.
警卫看到烟雾时发出了警报。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.