When answering simple yes-no questions in conversation, adding a few words to your answers can make your English sound a lot more natural. This is particularly true when responding to offers and requests.
Look at the follow examples:
a) Would you like some coffee? Yes. Vs. Would you like some coffee? Yes, that would be nice. Thank you. b) Can you come to the party? No. Vs. Can you come to the party? No, I’m afraid not.
In both cases, the second answer is more polite and friendly, so will allow the conversation to continue smoothly. On the other hand, the first (short) answer may seem rude and abrupt, and may cause the conversation to break down.
Here are some common expressions with which to answer yes-no questions:
Yes, that would be nice. No, I’m afraid. Yes, certainly/ course. No, sorry I/we can’t. Yes, I/we do. No, unfortunately…