What's the reason? 理由是什么呢？

Why do you think that? 你为什么那么想？

11. 能借用一下你的钢笔吗？

May I borrow your pen?

May I use your pen?

Is it okay if I use your pen?

Do you have a pen?

Do you have a pen that I can borrow?

12. 你能给我打个电话吗？

Would you give me a call?

Could you call me?

Can you ring me up?

I'd appreciate it if you could call me tonight.

13. 请关小点儿声。

Please turn it down.

Would you please turn it down?

Not so loud, please.

Please lower the volume.

It's too loud. Turn it down.

14. 等我回来。

Wait here until I get back.

Please wait here for me.

15. 我想打听点儿事。

May I ask you something?

May I ask (you) a question?

I'd like to ask you something.

I have a question.

Could you tell me something?

Do you have time to answer a question?

Could you answer a question?

I hate to bother you, but can I ask you a question? 真不好意思，打扰您了，我可以问个问题吗？

16. 对不起，打断一下可以吗？

Sorry for interrupting...

I'm sorry to interrupt you.

May I interrupt you?

Excuse me for interrupting.

Forgive me for interrupting.