What is the purpose of using of whether in a sentence Share with your friends Share 0 Roshini Anie Thomas answered this Whether is used to denote probability. For example, He is unsure whether it will rain tomorrow. 0 View Full Answer Arjun Nair answered this "whether" is used when two alternative is possible . 0 Aadivesh Tewari answered this Whether is used in a sentence when the answer is in yes or no. 0