Present Simple Negatives and Questions with Do and Does
In the present simple, every verb except 'to be' needs the helper 'do' or 'does' to make a negative or a question. The trick is that 'does' carries the -s ending, so the main verb goes back to its base form: we say "She doesn't eat meat," not "She doesn't eats meat," and "Does he live here?," not "Does he lives here?" Use 'do' with I, you, we, and they ("I don't like coffee"), and 'does' with he, she, and it. Once 'does' has taken the -s, the main verb stays plain.
Examples
- I don't like coffee. the speaker does not like coffee
- Does he live here? asking whether he lives here
- She doesn't eat meat. she does not eat meat
The full lesson
Everything in the video, in text.
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Does she works here? It sounds almost right — but that little -s gives you away. Let's fix it for good.
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Here's the key idea. For almost every English verb, you can't just add not or flip the words around. You need a little helper: do or does.
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Choosing between them is easy. Use do with I, you, we, and they. Use does with he, she, and it — the third person.
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And here's the part everyone trips on. When does shows up, it grabs the -s for itself. So the main verb drops its -s and goes back to its plain base form.
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Let's build some. Negatives first. With I, you, we or they, use do not — usually shortened to don't. I don't like coffee.
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Now third person. With she, it's does not — doesn't. And notice: it's eat, not eats. The -s is already sitting on doesn't. She doesn't eat meat.
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Questions work the same way. Put do or does at the very front, then the subject, then the base verb. Do you work here?
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With he, she or it, start with Does — and again, the main verb stays in its base form. Does he live here?
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The same helper comes back in short answers — you don't repeat the whole verb, just do or does. Yes, he does. No, he doesn't.
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Now the big trap. Because does already carries the -s, putting another one on the main verb is wrong. It's not Does she works. It's Does she work.
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Exactly the same with negatives. Not He doesn't works. Once doesn't is there, the verb goes back to base: He doesn't work.
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One important exception: the verb to be. It never uses do or does. With am, is, and are, you just add not or swap the word order directly. She isn't here. Is she here?
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So, to sum up: do or does makes negatives and questions, does takes the -s, and the main verb stays plain.