「・・・しません」と否定したい時には、動詞の前に「don't」をおきます。
します ➡︎ do
しません ➡︎ do not ＝ don't
doにぼっちの「s」（三単現のs）をつけると「 does」。
します ➡︎ does
しません ➡︎ does not ＝ doesn't
1. I don't go.
2. I don't cock lunch.
3. My brother doesn't read books.
4. My brother doesn't make a cake.
5. My father doesn't swim.
6. I don't use a knife and a fork.
7. I don't speak English.
8. I don't play the piano.