- You use mister before a man's name, usually the last name or the full name.
- Mister Brakel, the doctor will see you now.
- This is Mr. Terry McGinty.
- You call a man mister when you don't know his name.
- Excuse me, mister, I think you dropped this.
- You use mister before a man's title for certain titles, such as justice, mayor, president, etc.
- Yes, we can do that Mr. Mayor.
When you write it as part of somebody's name, you usually use Mr.