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 does did	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.