This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
Compro fruta en el mercado los sábados.
I buy fruit at the market on Saturdays.
PreteritePretérito indefinido
Le compré un regalo a mi mamá.
I bought my mom a gift.
Negative ImperativeImperativo negativo
No compres nada sin comparar precios.
Don't buy anything without comparing prices.