Common mistake: “Where he works?” — Correct: “Where does he work?”
Each wh- word asks for different information; in the present simple we use 'do' (you/we/they) and 'does' (he/she/it) + the base verb.
One question with each wh- (you / he-she)
Wh-
2nd person (you)
3rd person (he/she)
What
What do you do?
What does she do?
Where
Where do you live?
Where does he live?
When
When do you work?
When does she start?
Who
Who do you know?
Who does he live with?
Why
Why do you study?
Why does she travel?
How
How do you feel?
How does he go to work?
How often
How often do you read?
How often does she call?
What do you do? What does she do?
Where do you live? Where does he live?
When do you start work? When does the class start?
Who do you live with? Who does he know here?
Why do you study English? Why does she travel so much?
How do you feel today? How does he go to work?
How often do you exercise? How often does she call her family?
What time does the film start?
How much does it cost? How many languages does Kenji speak?
Practice
___ do you live? — In Medellín. (What, Where, When)
___ does she start work? — At eight. (Where, When, Who)
With he/she/it we use 'does': 'What does he do?'.
___ do you feel today? — I feel great. (how)
Why ___ she travel so much? (do/does)
How ___ languages does Kenji speak? (quantity)
Find the mistake: Where he works?
She lives in Bogotá. — Ask about the place (Where + does).
He goes to work by bus. — Ask about the manner (How + does).
Write a 'What' question about your father (3rd person).
Listening
Kenji: I love asking questions! Where do you live, Ben?
Ben: I live in London.
Kenji: What do you do there?
Ben: I work in a bookshop.
Kenji: How often do you travel?
Ben: Twice a year. Why do you ask so many questions?!
Reading
Kenji is curious about everyone. To his teacher he asks: 'What do you do at the weekend? Where do you go? Who do you meet?' To his friend he asks: 'What does Ben do? Where does he live? How often does he travel?' His questions never stop. 'You know,' says Sofía, 'a good question opens a door. And you, Kenji, open a hundred doors a day!'