alert
UK
US
Paraphrase
分析词义
"Alert" 是一个英文单词,它既可以作为名词也可以作为形容词,甚至可以作为动词。作为名词,它指的是警告或通知;作为形容词,它描述某人保持警惕和注意(尤其是在可能发生问题或危险的情况下);作为动词,它指的是通知或警告。
列举例句
词根分析
"Alert" 的词根来自于意大利词 "all'erta",意为“到瞭望塔”,这是因为瞭望塔是警告的发源地。这个词没有衍生出其他英语词汇。
词缀分析
"Alert" 是一个既没有词缀的单词。它是完整的单独的词根,没有前缀,也没有后缀。
发展历史和文化背景
此单词最初出现在英语中是在17世纪,来自于意大利的 "all'erta",是在战场、军队、航海中被产用来提醒人们注意可能出现的危险。
单词变形
"Alert" 的动词过去式和过去分词是 "alerted";进行时是 "alerting"。此外,"alert" 也词有变体,比如 "alerts"。
记忆辅助
可以联想“alert”是警报和保持警惕,可以想象你在危险中听到警报声,这是人类的本能反应,所以这个词就很好记了。
小故事
Ann was very alert when walking through the dark alley. She heard a strange sound and alerted the police immediately.(安在穿过黑暗小巷时非常警觉。她听到了一个奇怪的声音,并立即警告了警察。)
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