第一句：I took the wrong bus.

　　我坐错车了。

　　A: Oh, no. I took the wrong bus. Please let me off here.

　　哦，不，我坐错车了。请让我在这儿下车。

　　B: Sorry, Miss. I'm afraid I couldn't do that right now. You can get off at the next stop.

　　对不起，小姐。恐怕我现在不能那样做。您可以在下一站下车。

　　第二句：I got on the wrong bus.

　　我上错车了。

　　A: Excuse me. Does this bus go to Zhongshan Road?

　　请问这趟公交车到中山路吗？

　　B: I'm afraid not.

　　不去。

　　A: Oh, I got on the wrong bus. Can I get off there?

　　哦，我上错车了，能让我在这儿下吗？

　　B: No. You have to wait until next stop.

　　不可以的，你必须在下一站下车。

　　其他表达法：

　　当乘客坐错车时，司机也可以善意提醒：

　　You've got on the wrong bus. 你上错车了。