答案
1. 你知道。
2. 用作插入语，来表示转折语气，“对吧”。
3. 想要描述一件事情，但一时之间讲不清楚，对方大概也知道你在讲什么。

4. Are you thick in you head?
5. It's a tiny, little, itsy-bitsy problem. I can handle it.
6. Are you sure how to do it?
7. Are you sure of the facts?
8. You sure gave me a heart attack.