1. A short answer picks up the question's meaning
A question with Do or Does about a habit, preference, or ordinary fact can be answered without repeating the entire message. In Yes, I do, do picks up the action in the question, such as read, cook, or work. It does not name a separate action of doing something.
The short answer practised here contains Yes or No, a subject, and an auxiliary. First identify who and what fact the question concerns. Then confirm or deny that same fact. Do or Does in the question does not tell you whether the answer should be positive.
Yes, subject + do/does. | No, subject + don't/doesn't.
- subject / S —
- The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
Do you read in the evening? — Yes, I do.
Do you read in the evening? — Yes, I do.
The speaker answers about themselves: do replaces the repetition of read in the evening.
Does this bus stop here? — No, it doesn't.
Does this bus stop here? — No, it doesn't.
It refers to the bus; the answer denies that it stops at this particular place.
2. Make the auxiliary agree with the answer's subject
Use do or don't with I, you, we, and they. Use does or doesn't with he, she, and it. Person agreement still matters in negatives: No, she doesn't, but No, they don't.
A noun in the question is often replaced by a clear pronoun: this phone → it, these phones → they. For a person, use the pronoun established by context rather than guessing it from a name. They can refer to one person; it still takes do/don't.
I / you / we / they → do, don't | he / she / it → does, doesn't
Does your sister work here? — Yes, she does.
Does your sister work here? — Yes, she does.
She preserves the person the question is about; does is required.
Do these keys fit the door? — No, they don't.
Do these keys fit the door? — No, they don't.
There is more than one key: they + don't.
Alex uses they/them pronouns. Do they live nearby? — Yes, they do.
Alex uses they/them pronouns. Do they live nearby? — Yes, they do.
When they refers to one person, answer they do, not they does.
3. The pronoun depends on who is answering
You in a question can address one person or several. If only you are being asked and you answer about yourself, use I. If the question addresses you and someone else, and you answer for both of you, use we.
When the other speaker asks about themselves with I, that same person becomes you in your answer. For a third person, he/she/they usually stays the same. A pronoun change must preserve the real participant, not merely make a grammatical sentence.
A, to one person: Do you cook? — B: Yes, I do.
A, to one person: Do you cook? — B: Yes, I do.
One person answers about themselves.
A, to two people: Do you both cook? — B, for both: Yes, we do.
A, to two people: Do you both cook? — B, for both: Yes, we do.
We includes the speaker and the other person.
A: Do I need a ticket? — B: Yes, you do.
A: Do I need a ticket? — B: Yes, you do.
You in the answer refers to the person who has just said I.
4. Negatives can be full or contracted
Don't = do not, and doesn't = does not. Both versions are grammatical. Contractions are usual in conversation; full forms may sound more emphatic or formal. If an exercise specifically requests a full or contracted form, that is a task requirement, not a ban on the alternative in English.
In an affirmative short answer, keep do or does as a separate word. Do not add an apostrophe and s to do. In ordinary writing, put a comma after Yes/No, capitalise I, and end the answer with a full stop.
Do they sell bread? — No, they don't. / No, they do not.
Do they sell bread? — No, they don't. / No, they do not.
Both forms express the same negation.
Does he eat meat? — No, he doesn't. / No, he does not.
Does he eat meat? — No, he doesn't. / No, he does not.
He requires does in both the full and contracted forms.
5. A short answer is not the only correct response
A full answer is also correct: Yes, I like it. You can emphasise confirmation: Yes, I do like it means that you really do like it. This is a full sentence with emphasis, not a short answer. Only in an exercise explicitly requesting Yes/No + subject + auxiliary does it fail to meet the required short-answer form.
Yes and No on their own are also possible in real conversation. They are neither ungrammatical nor automatically impolite: appropriateness depends on the situation and intonation. Here we are practising another useful way to respond. You can add an explanation after a short answer unless the task limits you to a response without further detail.
Do you like this song? — Yes, I do. / Yes, I like it. / Yes, I do like it.
Do you like this song? — Yes, I do. / Yes, I like it. / Yes, I do like it.
All three versions are grammatical; only the first is the target short answer containing just the auxiliary after the subject.
Do you work on Sundays? — No, I don't. I work on Saturdays.
Do you work on Sundays? — No, I don't. I work on Saturdays.
The short answer denies working on Sundays; a separate sentence adds another fact.
6. Limits: not every question takes an answer with do
The main questions in this lesson begin with Do or Does. With be, modal can, and have got, the short answer uses a different verb. Examine the question's actual form, not merely whether a yes response is possible. Do you have a bike? requires do; Have you got a bike? requires have.
A question with a question word, such as Where do you live?, expects a place rather than simple confirmation. Past-time questions, negative questions such as Don't you…?, and more complex indirect responses are separate topics. Here we work with ordinary affirmative-form yes/no questions and clear facts.
Apply the skill in conversation with three checks: who is answering and who the answer concerns; whether the fact is true; and which auxiliary fits that subject and question. Then add a detail of your own if needed.
Are you ready? — Yes, I am.
Are you ready? — Yes, I am.
The question uses be, so the answer uses am rather than do.
Can she swim? — Yes, she can.
Can she swim? — Yes, she can.
Can remains can; does does not replace the modal here.
Do you have a bike? — Yes, I do. / Have you got a bike? — Yes, I have.
Do you have a bike? — Yes, I do. / Have you got a bike? — Yes, I have.
The meanings are similar, but the short answers pick up different auxiliaries.
Common mistakes
Incorrect:Yes, she do.
Correct:Yes, she does.
She requires does. Keep she: changing it to I would change the person being discussed.
Incorrect:No, I doesn't.
Correct:No, I don't.
Use don't with I, not doesn't; retain the negative meaning.
Incorrect:Yes, they does.
Correct:Yes, they do.
They agrees with do even when it refers to one person.
Incorrect:No, them don't.
Correct:No, they don't.
The subject form in the answer is they; them is the object form.
Incorrect:No, he don'ts.
Correct:No, he doesn't.
The negative form for he is doesn't. Do not add s to don't.
Sources
- British Council — Short forms: short answers
- British Council — Present simple
- British Council — Personal pronouns
- British Council — Emphasis: emphatic auxiliaries
- Cambridge English Grammar Today — Yes-no questions
- Cambridge — Singular they: teaching a changing language
- British Council — Present simple: have got