contoh kalimat dan kata asking and giving certainity

asking certainty:
-.are you sure that you will pass examination this year? 
- are you okay to go with me in this afternoon?
- are you sure?
-are you positive?
-are you certain?
-really?

giving certainty:
- i'm sure about that
- yes, i'm certain
- sure
-yes i'm sure
-yes,i'm certain
-i have no doubt
-absolutely
- definitely
-i'm positive