The Experssions of Certainty & Uncertainty

Speech Act

Asking for Certainty

°Are you certain?
°Are you sure?
°Really?
°Are you really certain about that, sir/Ma'am

Responding to Certainty

°I'm quite sure....
°Certainly / Definitely
°I've no doubt about....

Giving certainty
°I'm sure
°I believe
°I'm certain sure
°I have no doubt about it
°I'm absolutely certain that ....
°It must be ....
°I'm certain about it

Express Uncertainty
°I'm not sure
°I don't believe
°I'm not certain about it
°It's very unlikely that ....
°I hesitate
°I'm afraid it won't
°I'm doubtful about it