warn做動詞有警告;告誡;預先通知等意思，那么你知道warn的過去式是什么嗎?下面是學習啦小編為大家整理的warn的過去式和用法例句，希望對大家的學習有所幫助!

　　warn的過去式和其他時態(tài)：

　　過去式: warned

　　過去分詞: warned

　　現(xiàn)在分詞: warning

　　warn的用法：

　　warn的用法1：warn的意思是“警告,告誡”,強調及時發(fā)現(xiàn)正在來臨的或可能發(fā)生的危險或冒險,給人以忠告,從而可能避免危險或難堪的處境。

　　warn的用法2：warn只用作及物動詞,可接名詞、代詞、that從句作賓語,也可接由that從句充當直接賓語的雙賓語。warn還可接以介詞短語、動詞不定式充當補足語的復合賓語。

　　warn的用法3：warn可用于被動結構。

　　warn的過去式例句：

　　1. President Castro has warned Cubans to prepare for a profound economic emergency.

　　卡斯特羅主席已經提醒古巴人民為嚴重的經濟危急狀況做準備。

　　2. Television broadcasters were warned to exercise caution over depicting scenes of violence.

　　電視臺受到警告，要求對暴力場面的描繪采取謹慎態(tài)度。

　　3. Police warned motorists to allow extra time to get to work.

　　警方告誡駕車者出門上班要留出富余時間。

　　4. The defence counsel warned that the judge should stop the trial.

　　被告辯護律師強烈建議法官應該休庭。

　　5. "Keep quiet, or they'll all come out," they warned him.

　　“別作聲，否則他們全都出來了，”他們警告他。

　　6. The prosecutors have warned they will seek the death penalty.

　　檢控方律師已警告說他們會努力爭取判處死刑。

　　7. Analysts warned that Europe's most powerful economy may be facing trouble.

　　分析家警告說，歐洲最強大的經濟體可能將面臨困境。

　　8. He warned that his economic programme for the country was not negotiable.

　　他提醒說，他為這個國家制定的經濟計劃沒有商量的余地。

　　9. He warned that the action was damaging the economy.

　　他警告說該行動正對經濟造成破壞。

　　10. He warned that lifting copyright restrictions could beggar the industry.

　　他警告說解除版權限制會使這個行業(yè)一貧如洗。

　　11. Unionist hardliners warned the U.S. President he would not be welcome.

　　統(tǒng)一派強硬分子警告美國總統(tǒng)，他是不會受歡迎的。

　　12. He warned the public to be vigilant and report anything suspicious.

　　他警告公眾要提高警惕，遇到任何可疑情況都要報告。

　　13. They warned him that next time he'd find himself doing bird.

　　他們警告他下次他可能就要進監(jiān)獄了。

　　14. He warned that the effects of any war would be incalculable.

　　他警告說任何戰(zhàn)爭造成的后果都是不可估量的。

　　15. He pressed for a full investigation, but was warned off.

　　他迫切要求展開全面調查，但是被叫停。