a forewarning of sth
可数名词，常用 a forewarning of 表示“……的预兆或预警”。
The dark clouds were a forewarning of the storm.
乌云是暴风雨的预兆。
预先警告；预兆
forewarnings — plural of forewarning
预先警告的；事先告知( forewarn的现在分词 )
预先警告；预兆
An advance warning; an omen.
The dark clouds were a forewarning of the approaching storm.
乌云是即将到来的风暴的预先警告。
用法提示：此处forewarning为名词，表示‘预先警告’。
His sudden silence gave me a forewarning that something was wrong.
他突然的沉默给了我一个预先警告，有些事情不对劲。
用法提示：forewarning作为名词，指一种预示的信号。
The company's falling stock prices served as a forewarning of the financial crisis.
公司股价下跌是金融危机的预先警告。
用法提示：forewarning表示对未来事件的早期警示。
可数名词，常用 a forewarning of 表示“……的预兆或预警”。
The dark clouds were a forewarning of the storm.
乌云是暴风雨的预兆。
后可接 that 从句，说明预警的具体内容。
They ignored a forewarning that the river would rise.
他们无视了河水将会上涨的预警。
固定搭配 without forewarning 表示“事先没有任何预警”。
The attack came without forewarning.
袭击毫无预警地发生了。
常用 give sb forewarning of sth 表示“就某事事先警告某人”。
The company gave employees forewarning of the layoffs.
公司事先向员工发出了裁员的预警。
grammar · medium
易错句子The villagers said they had received three forewarning about the flood.
正确表达The villagers said they had received three forewarnings about the flood.
forewarning 是可数名词，前面有基数词 three 时，必须用复数形式 forewarnings，不能保留单数形式。
grammar · medium
易错句子He gave us a forewarn about the deadline.
正确表达He gave us a forewarning about the deadline.
表示“预先警告”的名词是 forewarning，forewarn 只是动词，不能直接当名词用，所以不能说 a forewarn。
grammar · medium
易错句子The radio gave a beforehand warning of the typhoon.
正确表达The radio gave a forewarning of the typhoon.
beforehand 只能作副词，不能放在名词前作定语；汉语“事先的警告”在英语里要用 forewarning 这样的名词（或 advance warning），不能说 a beforehand warning。
forewarning 强调事情发生之前就发出的提醒或预兆，隐含“预先”之意；warning 只是普通的警告或警示，可当场或事后发出，不强调提前。
omen 指客观事物所预示的吉凶征兆，常带神秘或迷信色彩，不一定有人发出；forewarning 侧重来自人或情势的事先警告，也可指不祥的预感。
premonition 是发自内心的直觉预感，没有外部来源；forewarning 是来自外部的事先警告或明确征兆。
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