We use “doesn’t” (a contraction of “does not”) in negative sentences with singular third-person subjects (he, she, it)
- He doesn’t like chocolate.
- She doesn’t work on weekends.
- It doesn’t look good.
We use “don’t” (a contraction of “do not”) in negative sentences with subjects like I, you, we, and they
- I don’t understand what you mean.
- You don’t need to bring anything.
- We don’t go to the gym on Sundays.
- They don’t like spicy food.
Exercise
Simple Present
Write don’t or doesn’t to complete the sentences
