That's for sure和sure有区别吗?

That's for sure和sure有区别吗?
That's for sure和sure有区别吗?

That's for sure和sure有区别吗?
That's for sure
自然是的,必然的,肯定的,正面的,毫无疑问的.
Are you sure (of it)? Are you sure (of it)?
你能肯定吗?你能肯定吗?

第一个及其肯定的语气。第二个sure 是随意的 答应要求···