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possible likely probably certain
when, if whether, whether if, whether whether, if
that; that that; whether if; that if; whether
which room he lives in which room does he live in he lives in which room in which room does he live
which room he lives in which room does he live in he lives in which room in which room does he live
I’m not sure that he will give back the money. If you like it or not, I’m taking you to the doctor. He asked me if or not I wanted to play. I’m not sure if I’m pronouncing his name correctly.
how he will be back that he has come back why he has come back if he has been back
I hope not I’m sure I don’t think so I’m afraid so
I don't think so I'm not sure I don't agree with you I'm afraid so
possible likely impossible certain
possible likely impossible certain
I doubt I don’t doubt I wonder I’m not sure
I’ll have a look at him I’ve know that I’ve no idea I’m sure of that