would buy
Si fuera un rico, te compraría un anillo de diamantes.
If I were rich, I would buy you a diamond ring.
Si me ganara la lotería, compraría un coche nuevo.
If I won the lottery, I would buy a new car.
Si tuviese bastante dinero, me compraría ese coche.
If I had enough money, I would buy that car.
Tom dijo que si ganara la lotería, compraría una casa nueva.
Tom said that if he won the lottery, he would buy a new house.
Si fuera más barato, lo compraría sin pensarlo dos veces.
If it were cheaper, I would buy it without a second thought.
Un vestido así, yo no lo compraría jamás.
I would never buy a dress like that.