please ³

1. Will you be quiet, please? 请安静些好吗？

2. Could you put this case on the shelf for me, please? 请帮我把这只箱子放在架子上好吗？

please 也可以用在表示疑问的疑问句中：

Is John there, please? 请问,约翰在你那儿吗?