2、run across無意間碰到。
I ran across her in the public library yesterday.
我昨天在公共圖書館碰見她了。
3、run out 用完，耗盡；(指協議﹑文件等)失效, 過期。
Our food is running out. Will you go to the supermarket to buy some bread?
我們的食物快吃完了,你能到超市買些面包嗎?
4、run out of 用完某物。
The aircraft will run out of fuel in another hour.
再過一小時飛機的燃料就將用完。
5、run over溢出；撞倒并碾過；復習。
The bath is running over — turn the taps off.
浴池的水溢出來了。把水龍頭關上。
He ran over a rabbit as he was driving back from a meeting.
他在會后開車回來的路上撞了一只兔子。