英语词汇“alert”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词

alert

释义

adjective | verb | noun

alertalert1 /əˈlɚt/ ●●○ adjective

ETYMOLOGYalert¹

Origin: 1500-1600 French alerte, from Italian all' erta on the watch

COLLOCATIONS► be alert to

When walking alone at night, be alert to your surroundings.

► mentally alert

Exercise helps keep me mentally alert.

► stay/remain alert

The medicine can make it difficult to remain alert.

► alert to the possibility

The authorities should have been alert to the possibility of an attack.

1giving all your attention to what is happening, being said, etc.: The deer raised its head, suddenly alert. When walking alone at night, be alert to your surroundings.2able to think quickly and clearly: Exercise helps keep me mentally alert.stay/remain alert The medicine can make it difficult to remain alert.3be alert to something to know about or understand something, especially a possible danger or problem: The authorities should have been alert to the possibility of an attack. [Origin: 1500–1600 French alerte, from Italian all' erta on the watch]

adjective | verb | noun

alertalert2 ●●○ verb [transitive]

VERB TABLE

alert

Simple Form
Present	I, you, we, they	alert
	he, she, it	alerts
Past	I, you, he, she, it, we, they	alerted
Present perfect	I, you, we, they	have alerted
	he, she, it	has alerted
Past perfect	I, you, he, she, it, we, they	had alerted
Future	I, you, he, she, it, we, they	will alert
Future perfect	I, you, he, she, it, we, they	will have alerted

Continuous Form
Present	I	am alerting
	he, she, it	is alerting
	you, we, they	are alerting
Past	I, he, she, it	was alerting
	you, we, they	were alerting
Present perfect	I, you, we, they	have been alerting
	he, she, it	has been alerting
Past perfect	I, you, he, she, it, we, they	had been alerting
Future	I, you, he, she, it, we, they	will be alerting
Future perfect	I, you, he, she, it, we, they	will have been alerting

1to officially warn someone of a problem or danger so that he or she can be ready to deal with it: School officials alerted the police immediately.2to make someone notice something important or dangerous: alert somebody to something A large sign alerts drivers to bad road conditions.

adjective | verb | noun

alertalert3 noun [countable]

COLLOCATIONS► security alert

During a security alert (=warning about an attack), no planes can take off.

► put on alert

All hospitals in the area were put on alert (=warned so that they would be ready) to receive casualties.

► be on high/full alert

Miami police were on high alert after a night of violence.

1a warning to be ready for possible danger: a smog alert During a security alert (=warning about an attack), no planes can take off. → see also red alert2on (the) alert ready to deal with a situation or problem: Teachers are on the alert for signs of drug use. All hospitals in the area were put on alert (=warned so that they would be ready) to receive casualties.be on high/full alert Miami police were on high alert after a night of violence.

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