alert过去式和用法例句

alert做动词有使意识到;警惕等意思，那么你知道alert过去式是什么吗?下面本站小编为大家带来的alert的过去式和用法例句，供大家参考学习!

　　alert的过去式和其他时态：

过去式: alerted

过去分词: alerted

现在分词: alerting

　　alert的用法：

alert的用法1：alert的基本意思是指让某人对可能发生的危险或潜在的危险保持警觉或准备好迎击敌人,可译作“(向)…发出警告,使处于戒备状态”。

alert的用法2：alert是及物动词,提醒、警觉或戒备的内容常由介词to引出,提醒作为准备的内容则由介词for引出。

alert的用法3：alert也接双宾语,其直接宾语多为that引导的从句。alert还可接以动词不定式充当补足语的复合宾语。

　　alert的过去式例句：

1. The mystery hero imme-diately alerted police after spotting a bomb.

那个无名英雄发现炸弹后马上报了警。

2. The 23-year-old's screams alerted a passerby who went to her rescue.

那个23岁女孩的尖叫引来了一位过路人前去营救。

3. Neighbours heard the sound of rifle fire and alerted the police.

邻居们听到了步枪声，就报了警。

4. Communities downstream have been alerted.

下游的社区已经接到了预警。

5. A surly jobsworth alerted security.

一个态度粗暴、工作死板的人叫了警卫。

6. The coastguard was alerted.

海岸警卫队已接到报警。

7. The boss alerted him that thief might come out at night.

老板要他提防夜里可能有贼.

8. The voice of the caller alerted her.

呼唤者的声音使她警觉起来.

9. The operator is alerted to this situation by blinking front - panel indicators.

面板上的指示器将出现闪光,对操作者发出出现这种情况的警告.

10. The New Orleans police would by now be alerted.

新奥尔良的警察现在可能已处于待命状态.

11. Such diffidence calmed rather than alerted us.

这种优柔寡断的调子没有使我们警觉起来,反倒使我们安心了.

12. Had Walden alerted the police yet ?

沃尔登通知警察了 吗 ?

13. You asked to be alerted when this item is changed.

您要求当此项目被更改后收到通知.

14. The doctor alerted me to the danger of a heart attack.

医生提醒我注意心脏病发作的危险.

15. The coast guard alerted the town to the coming hurricane.

海岸警备队令市民警觉即将来临的飓风.