run的过去式是ran、run，过去分词是ran、run，第三人称单数现在时是runs，现在分词是running、run。

例句：

1、I excused myself and ran back to the telephone.

我说了声抱歉，跑回到电话机旁。

2、The owner insisted on Cool Ground running in the Gold Cup.

主人坚持要让“酷地”参加金杯赛马会。

3、The hallway ran the length of the villa.

走廊贯穿了整个别墅。

4、Our host ran a long extension cord out from the house and set up a screen and a projector.

我们的主人从房里牵出一根延长电线，架起屏幕和投影仪。

5、He laughed and ran his fingers through his hair.

他笑了，用手指拢了拢他的头发。