mencari 5 contoh kalimat kepastian dan ketidakpastian

Kalimat kepastian
1. I'm absolutely certain about it
2. I'm sure / certain about .....
3. I'm not doubt about it
4. I'm absolutely sure about the news
5. It has been confirmed

Kalimat ketidakpastian
1. Sorry, I'm not sure about it.
2. I don't know for sure
3. I don't think that
4. I'm doubtful
5. I'm not certain...