SAT词汇的掌握是大家取得SAT考试好成绩的基础，今天文都网校小编为大家提供的是SAT真词alert，以下是详细内容。

　　alert

　　adj.警觉的，警惕的，注意的; 思维敏捷的; 活泼的;

　　n.警报; 警戒状态;

　　vt.向…报警;

　　第三人称单数：alerts过去分词：alerted复数：alerts现在进行时：alerting过去式：alerted

　　1.ADJ-GRADED警觉的;警惕的;留神的;机敏的If you are alert, you are paying full attention to things around you and are able to deal with anything that might happen.

　　We all have to stay alert...

　　我们大家都必须保持警惕。

　　alertness

　　The drug improved mental alertness.

　　该药有助于提神。

　　2.ADJ-GRADED充分意识到…的;完全感觉到…的If you are alert to something, you are fully aware of it.

　　The bank is alert to the danger.

　　银行充分意识到了危险。

　　3.N-COUNT警戒(状态);戒备(状态)An alert is a situation in which people prepare themselves for something dangerous that might happen soon.

　　Due to a security alert, this train will not be stopping at Oxford Circus.

　　由于安全戒备的原因，该次列车在“牛津街口广场”站将不停留。

　　4.VERB向…报警;使警觉;使警惕;使注意If you alert someone to a situation, especially a dangerous or unpleasant situation, you tell them about it.

　　He wanted to alert people to the activities of the group...

　　他想提醒人们小心该团体的活动。

　　5.See also:red alert

　　6.PHRASE处于警戒状态;保持戒备If soldiers or police are on alert, they are ready to deal with anything that may happen.

　　Soldiers and police have been put on alert.

　　士兵和警方都已进入警戒状态。

　　7.PHRASE准备就绪;防备着If you are on the alert for something, you are ready to deal with it if it happens.

　　They want to be on the alert for similar buying opportunities.

　　他们希望随时掌握有关类似购买机会的信息。

　　例句：

　　1.Nations prepare as world health organization raises the alert level.

　　国内为世卫组织提升警报级别做好准备。

　　2.Security forces in india's biggest cities were put on heightened alert.

　　在印度各大城市，安全部队提高了警戒级别。

　　3.The alert among you will realise that the two numbers are identical.

　　你心中的警觉感将会意识到两个问题是相同的。

以上就是今天的SAT真题词汇：alert的相关内容。