We use “doesn’t” (a contraction of “does not”) in negative sentences with singular third-person subjects (he, she, it)
- He doesn’t like to play video games
- She doesn’t have to work on the weekends
We use “don’t” (a contraction of “do not”) in negative sentences with subjects like I, you, we, and they
- I don’t know how to cook
- You don’t have to do do that
Exercise
Simple Present
Write don’t or doesn’t to complete the sentences
