not have a clue

• 毫无头绪

not have a clue的用法和样例：

例句

1. I haven't got the slightest idea.
   我什么也不知道。
2. I had a fight with the man,and after it I blacked out.
   我和那个人打了起来，之后我就昏了过去，什么也不知道了。