warn的用法和短语例句

warn有警告;告诫;预先通知等意思，那么你知道warn的用法吗?下面跟着本站小编一起来学习一下，希望对大家的学习有所帮助!

　　warn的用法大全：

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的常用短语：

warn against (v.+prep.)

warn of (v.+prep.)

warn off1 (v.+adv.)

warn off2 (v.+prep.)

warn的用法例句：

1. He spends his spare time visiting schools to warn pupils off drugs.

他用自己的业余时间访问学校，告诫小学生远离毒品。

2. Signs across the entrances warn all visitors to stub out their cigarettes.

入口处的告示牌提醒游客们熄灭香烟。

3. Lawrence kept on butting me but the referee did not warn him.

劳伦斯不停地用头撞我，但是裁判并没有警告他。

4. I must warn you against raising your hopes.

我必须警告你不要期望过高。

5. Analysts warn us away from drawing any conclusions.

分析家劝告我们不要妄下结论。

6. Soon an official appeared to warn them away.

很快一位官员出来劝告他们离开。

7. I'll run ahead and warn them.

我要跑在前头，警告他们。

8. I tried to warn him, but he wouldn't listen.

我设法提醒过他，可他就是不听。

9. Did he warn you that he might be late?

他有没有预先告诉你他可能会迟到?

10. I must warn you that my patience is almost at an end.

我必须警告你我已经没有耐心了.

11. But I want to warn you now that something might go wrong.

要是砸锅了,你可别后悔呀!

12. It is incumbent upon you to warn them.

你有责任警告他们.

13. It is my duty to warn you.

我有责任向你提出警告.

14. Economists warn that enormous pressures could build up, forcing people to emigrate westwards.

经济学家警告，迫使人们向西部迁移的压力可能会增至很大的程度。

15. Teachers warn today that Latin, Greek and other classics will be squeezed out of school timetables.

老师们今天发出警告说，拉丁语、古希腊语和其他古典文学将被挤出学校的课程表。