Question 1

How do I make a negative sentence in present simple?

Accepted Answer

Put "don't" or "doesn't" before the basic form of the verb. Use "don't" with I, you, we, and they: "I don't eat meat," "We don't watch TV." Use "doesn't" with he, she, and it: "He doesn't play tennis," "She doesn't work here." The main verb must stay in its basic form with no -s ending. The full forms are "do not" and "does not," but in everyday English we almost always use the short forms "don't" and "doesn't." This is one of the most important rules in English grammar.

Question 2

What is the difference between don't and doesn't?

Accepted Answer

"Don't" is used with I, you, we, and they — these are called first person, second person, and plural subjects. "Doesn't" is used with he, she, and it — these are third person singular subjects. For example: "I don't know" but "He doesn't know." A helpful way to check: if you would use "Does" in a question ("Does he know?"), then use "doesn't" in the negative ("He doesn't know"). This don't/doesn't choice depends entirely on whether the subject is singular third person or not.

Question 3

Why do I use the basic form of the verb after doesn't?

Accepted Answer

"Doesn't" already carries the third person meaning — it tells the listener that the subject is he, she, or it. So the main verb does not need the -s ending. Compare: "She likes tea" (positive — the verb has -s) and "She doesn't like tea" (negative — the verb has no -s). A very common mistake is writing "She doesn't likes tea" — this is wrong because you are marking the third person twice. Think of it this way: only one word in the sentence gets the -s. In positive sentences, the verb gets it. In negative sentences, "doesn't" gets it instead.

Present Simple Negative Statements

Quick Rule

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Present Simple Dictation: Routines and Third-Person Forms

Positive Form

Third Person -s

-ed vs -ing Adjectives

Conditionals

Present Perfect