when we use does and don't

DON'T - DOESN'T - Negative Sentences To make a negative sentence in English we normally use Don't or Doesn't in the present sentence. Don't and Doesn't are used in negative sentences with all verbs EXCEPT To Be and Modal verbs (Can, might, should etc.). Affirmative: You speak Spanish. Negative: You don't speak Spanish. You will see that we add don't between the subject and the verb. We use Don't when the subject is I, you, we or they. Affirmative: He speaks Spanish. Negative: He doesn't speak Spanish. When the subject is he, she or it, we add doesn't between the subject and the verb to make a negative sentence. Notice that the letter S at the end of the verb in the affirmative sentence (because it is in third person) disappears in the negative sentence. Examples of sentences using don't and doesn't: I don't like junk food. We don't need a dictionary. He doesn't want to get out of bed. It doesn't rain in the desert.

Does We use does with third person singular pronouns i.e when the subject is he, she or it. Does he work with you? Does she have a car? Does it snow in winter?