No 1. Sorry to trouble you.

Trouble 麻烦

比如：

Sorry to trouble you, but could you tell me the way to the bus station, please?

不好意思麻烦你一下，请问您知道怎么去公交车站吗？

No 2. May I trouble you... ？能麻烦您...？

比如：

May I trouble you to open the window?

能麻烦您开一下窗户吗？

No 3. Could I bother you... ？能麻烦您...？

bother 打搅；麻烦

比如：

Could I bother you for a glass of milk?

能麻烦您给我来杯牛奶吗？