Saying what does not happen with do not and does not — Foreign languages, 7–10 years
Do not and does not turn a present-tense statement into a negative one. Foreign languages, 7–10 years.
Do not means no
To say that an action is not true or does not happen, English often uses do not or does not before the main verb. Use do not with I, you, we and they, and does not with he, she and it. In short forms, these become don’t and doesn’t.
Why add a negative helper?
A sentence needs a clear signal when an action is not happening. English uses not with do or does so the listener can spot the negative idea straight away. This also leaves the main verb in its simple form, making one small rule work with many action words.
Turn a sentence into a negative
Start with “Nora likes bananas.” Nora means she, so choose does not. Put it before the action: “Nora does not”. Now remove the s from likes, because does has taken that job. The full sentence is “Nora does not like bananas”, or “Nora doesn’t like bananas” in the short form.
Do not put the s twice
A reasonable mistake is “She doesn’t likes football.” The s feels necessary because she is one person, and in a positive sentence we say likes. But doesn’t already carries the third-person mark. Say “She doesn’t like football”: the helper changes, while the main verb stays simple.
Correcting a wrong idea
Negative sentences help when you need to correct information politely: “I don’t have your book”, “The shop doesn’t open today” or “They don’t live here.” They are also useful for rules and safety, such as “We don’t touch the hot pan.”
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