warn做动词有警告;告诫;预先通知等意思，那么你知道warn的过去式是什么吗?下面是小编为大家整理的warn的过去式和用法例句，希望对大家的学习有所帮助!

warn的过去式和其他时态：

过去式: warned

过去分词: warned

现在分词: warning

warn的用法：

warn的用法1：warn的意思是“警告,告诫”,强调及时发现正在来临的或可能发生的危险或冒险,给人以忠告,从而可能避免危险或难堪的处境。

warn的用法2：warn只用作及物动词,可接名词、代词、that从句作宾语,也可接由that从句充当直接宾语的双宾语。warn还可接以介词短语、动词不定式充当补足语的复合宾语。

warn的用法3：warn可用于被动结构。

warn的过去式例句：

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

卡斯特罗主席已经提醒古巴人民为严重的经济危急状况做准备。

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

电视台受到警告，要求对暴力场面的描绘采取谨慎态度。

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

警方告诫驾车者出门上班要留出富余时间。

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

被告辩护律师强烈建议法官应该休庭。

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

“别作声，否则他们全都出来了，”他们警告他。

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

检控方律师已警告说他们会努力争取判处死刑。

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

分析家警告说，欧洲最强大的经济体可能将面临困境。

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

他提醒说，他为这个国家制定的经济计划没有商量的余地。

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

他警告说该行动正对经济造成破坏。

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

他警告说解除版权限制会使这个行业一贫如洗。

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

统一派强硬分子警告美国总统，他是不会受欢迎的。

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

他警告公众要提高警惕，遇到任何可疑情况都要报告。

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

他们警告他下次他可能就要进监狱了。

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

他警告说任何战争造成的后果都是不可估量的。

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

他迫切要求展开全面调查，但是被叫停。