afirmativ
1-I play tennis
2-she goes to school
3- we sing a song
4- they swim in the ocean
interogativ
1- do i play tennis?
2-does she go to school?
3- do we sing a song?
4-do they swim in the ocean?
negativ
1- i don't play tennis
2-she doesn't go to school
3- we don't sing a song
4-they don't swim in the ocean