I suggest

I think

I don't think you should...

You should..（否定在后面加not）

You ought to..

You'd better..（否定在后面加not）

I suggest you keep early hours from now on.

我建議你現在開始早睡早起。

A: Are you feeling better today, Steven?

史蒂芬，你今天感覺好點了嗎？

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

好多了，就是晚上睡覺的時候還會咳嗽。

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

你應該聽取醫生的建議，把煙戒掉，它很不利于你恢復健康。

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.

沒關系，我相信過幾天我的病就會好了。我上一次生病，即使我吸煙也不照樣好了。

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.

那是因為你上次病的不嚴重，但這次醫生已經明確給你建議，讓你不要吸煙。

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

說的容易做著難。我是老煙民了，現在戒煙對我來說真的很困難。

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

并沒有那么難，只要你下定決心，就一定能成功的。

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

其實我很早以前就是過了，但都以失敗告終。

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

但這次不一樣啊，你是在為了你的健康而努力，你有了目標。

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

但你知道的，我經常熬夜，吸煙能讓我保持清醒。

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

你為什么不早點睡呢？

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

最近我忙于一個項目，還有一個星期就是截止時間了，我必須在這段時間內完成。

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

忙完這段時間，你的時間就很充足了，所以你最好還是早睡早起吧。

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

說得對，我是應該改改我的習慣了，我會試試的，謝謝你。

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

希望你能夠盡快好起來，并且成功戒煙。