Making Negatives and Questions in the Present Simple
To make negative sentences and questions in the Present Simple, we need a helper: the auxiliary verb do or does. This small word does the "grammar work", so the main verb stays in its base form.
Structure
- Negative: Subject + do not (don't) / does not (doesn't) + base form of the verb. Example: She doesn't like coffee.
- Question: Do/Does + subject + base form of the verb? Example: Does she like coffee?
- Wh-question: Question word + do/does + subject + base form of the verb? Example: Where does she work?
How the Grammar Works
- Use does with 'he', 'she', and 'it'. Use do with 'I', 'you', 'we', and 'they'.
- When you use 'does' or 'doesn't', the main verb loses its 's'. The 's' moves to the helper. Example: 'She likes tea' becomes 'She doesn't like tea', not 'She doesn't likes tea'.
- In questions, put 'do' or 'does' before the subject. Example: 'Do you play tennis?'
- In short answers, repeat the helper, not the main verb: 'Do you play tennis?' — 'Yes, I do.' / 'No, I don't.'
Common Use Cases
- Saying what people don't do: I don't eat meat.
- Asking about habits and routines: Does he work on Saturdays?
- Asking for specific information: Where does he work? What do you do?
- Giving short answers: Yes, he does. / No, he doesn't.
Frequent Mistakes and How to Avoid Them
- Keeping the 's' on the main verb: Incorrect: "She doesn't likes pizza". Correct: "She doesn't like pizza".
- Forgetting the helper in questions: Incorrect: "You like tea?". Correct: "Do you like tea?"
- Using 'do' instead of 'does' with he/she/it: Incorrect: "Do she work here?". Correct: "Does she work here?"
- Keeping the 's' after a Wh-word + does: Incorrect: "What does she likes?". Correct: "What does she like?"
Comparison with Related Grammar
In positive sentences, the Present Simple does not use 'do' or 'does' — the verb changes instead ('She works'). The helper appears only in negatives and questions. Do not confuse this with the verb 'to be': with 'am', 'is', and 'are' we never use 'do' or 'does' ('Is she happy?', not 'Does she be happy?').
Wh-Questions in the Present Simple
To ask for specific information (not just yes/no), add a question word before 'do' or 'does': where, what, when, why, who, how.
- Where does he work? — He works at a hospital.
- What do you do? — I'm a teacher.
- Why doesn't she call? — She's usually busy.
- How often do you exercise? — Twice a week.
The rule stays the same: after 'do' or 'does', the main verb never takes an extra 's', even in Wh-questions. Incorrect: "What does she wants?" Correct: "What does she want?"
Example Sentences
- I don't understand this word.
- Does your brother speak English?
- We don't watch TV in the morning.
- Do they live near you? — Yes, they do.
- He doesn't want to go home.
- What does your sister study at university?
When to Use This Rule
Use 'do' and 'does' every time you make a negative sentence or a question in the Present Simple. Remember: the helper takes the 's', and the main verb stays in its base form — including after a question word.