You need to ...  你应该做某事

　　You need to call her right now. 你现在得马上给她打电话。

　　You need to talk with your teacher. 你得和你的老师谈谈。

　　Do you need to get up early tomorrow morning? 你早上必须要早起吗？

　　Do you know what I mean? 你知道我说的是什么意思吗？

　　Yeah! You're saying you need to take a day off.  恩！你是说你需要休息一天。