Affirmative.
Mary wrote a nice story.
María escribió una bonita historia)
Jack drank a glass of water.
Jack bebió un vaso de agua)
You broke my glasses.
Tu rompiste mis gafas.
He brought me a flower.
El me trajo una flor.
They bought a new car.
Ellos compraron un coche nuevo.
Negative.
Mary didn´t write a nice story.
Jack didn´t drink a glass of water.
You didn´t break my glasses.
He didn´t bring me a flower.
They didn't´buy a new car.
Interrogative
Did Mary write a nice story?
Yes he did
Did Jack drink a glass of water?
No he did´t
Did you break my new glasses?
Yes I did.
Did he bring me a flower?
Yes, he did
Did they buy a new car?
No, they didn´t.