如何用英文礼貌劝告别人？

I suggest

I think

I don't think you should...

You should..

You ought to..

You'd better..

I suggest 

you keep early hours from now on.

我建议你现在开始早睡早起。

A: 

Are you feeling better today, Steven?

史蒂芬，你今天感觉好点了吗？

B: Much better. But I am still coughing at night.

好多了，就是晚上睡觉的时候还会咳嗽。

A: You should take advice from your doctor to quit smoking. It's bad for your health.

你应该听取医生的建议，把烟戒掉，它很不利于你恢复健康。

B: It doesn't matter. I'm sure I'll be all right in a few days. Just like I got sick last time, I still got better even if I smoke.

没关系，我相信过几天我的病就会好了。

我上一次生病，即使我吸烟也不照样好了。

A: That's because you weren't seriously ill last time. But this time, the doctor has made it clear to you not to smoke. 

那是因为你上次病的不严重，但这次医生已经明确给你建议，让你不要吸烟。

B: Easier said than done. I'm a heavy smoker and it's really hard for me to quit smoking now. 

说的容易做着难。

我是老烟民了，现在戒烟对我来说真的很困难。

A: Not that hard. You can make it if you make up your mind. 

并没有那么难，只要你下定决心，就一定能成功的。

B: Actually, I tried it a long time ago, but it all ended in failure.

其实我很早以前就是过了，但都以失败告终。

A: But this time is different. You're working for your health. You have a goal.

但这次不一样啊，你是在为了你的健康而努力，你有了目标。

B: But you know, I often stay up late and smoking keeps me awake. 

但你知道的，我经常熬夜，吸烟能让我保持清醒。

A: Why didn't you go to bed earlier?

你为什么不早点睡呢？

B: I've been busy with a project recently. And one week is the deadline. I have to finish it during this time. 

最近我忙于一个项目，还有一个星期就是截止时间了，我必须在这段时间内完成。

A: You will have plenty of time after this, so you'd better go to bed and get up early by then.

忙完这段时间，你的时间就很充足了，所以你最好还是早睡早起吧。

B: You are right. I should change my habits. I'll give it a try. Thank you.

说得对，我是应该改改我的习惯了，我会试试的，谢谢你。

A: I hope you can get better soon and quit smoking successfully. 

希望你能够尽快好起来，并且成功戒烟。