Will you take a picture for us please? 请问您能为我们照张相吗？

Certainly. 当然了。

Please take the flower-bed as the background. 请把花坛作为背景。

All right. 好的。

Are you ready? Say "Cheese". OK. 你们准备好了吗？说“Cheese”，好了。

(to a passer-by) Excuse me, sir. Could you take a photo of us please? （向过路人）打扰一下，先生。能为我们拍张照吗？

Certainly. Are you ready? Say "Cheese". OK. 当然。您们准备好了吗？说“Cheese”，好了。