if you study, you will pass your exams
Si estudiaras, aprobarías tus
exámenes
if you had studied, you would have passed your exams
Si hubieras estudiado, habrías
aprobado tus exámenes
i would say
Diría
i would have
e.g. I would have gone to the party, but I had to work
Habría
e.g. Habría ido a la fiesta, pero tuve que trabajar.
would do
Haría
could
e.g. could i try?
Podría
e.g. ¿podría intentarlo?
i would want
Querría
would know
Sabría
would go out
Saldría
would have to
e.g If I left, he would have to work.
Tendría
e.g. Si yo me fuera, él tendría que trabajar.
would come
Vendría