Yes / No questions in English

The table below shows some examples of yes/no questions in English with affirmative and negative answers.

Yes/No questions Affirmative answers Negative answers
be Are you ready? Yes, I am. No, I'm not.
Is he coming? Yes, he is. No, he isn't.
Were you late? Yes, we were. No, we weren't.
have Have you finished? Yes, I have. No, I haven't.
Has he gone? Yes, he has. No, he hasn't.
Do you enjoy it? Yes, I do. No, I don't.
Does he like it? Yes, he does. No, he doesn't.
Did you write it? Yes, I did. No, I didn't.
modal verbs Can I see her? Yes, you can. No, you can't.

It is very unusual to answer Yes/No questions in full.
Did she send the email yesterday?
Yes, she sent the email yesterday.
No, she didn't sent the email yesterday.

Answering Yes/No questions with only Yes or No can be seen as unfriendly or rude.
Do you enjoy the party? - Yes./No.