Wait a minute, please. 请稍等一下。
This way ,please. 请这边走。
Please tell me. 麻烦你告诉我一下。
Please take care of safety. 请注意安全。
Of course. 当然可以。
May I ask a question 我能问你一个问题吗？
Let’s not waste our time． 咱们别浪费时间了。
Let me think over,please. 请让我想一想。
Keep off the grass，please. 请不要践踏草坪。
Keep environment tidy，please. 请保持环境卫生。