Asking and response certainty (Menanyakan & menanggapi kepastian)

~ Asking certainty :

1. Do you think......??

2. Are you sure......??

3. Are you certain....??

4. Really??

5. Isn't??

6. Will it be OK??

~ Response certainty :

1. I think so.

2. I'm sure.

3. I'm really certain.

4. Yes, of course!

5. Absolutely!

6. Certainly!

7. No doubt.

~ Response uncertainty :

1. I don't think so.

2. I'm not sure.

3. I'm not certain.

4. I'm in doubt / I doubt.

5. It's possible but not sure.

Examples :

~ Adhel : Alia, do you know that uncle Angga would get married this week?

   Alia    : Really? Are you sure with that?

   Adhel : I'm sure. My father has the invitation to his wedding party.

~ Adhel : Are you certain that I leaved my english book in the classroom?

   Alia    : I'am really certain. I saw your english book under your desk.