Simple past grammar

Zero conditional: It's used to speak about general truth, scientific facts and things wich are always right

Present simple en los dos (if/consequence) He/she/it-->s/es/ies

First Conditional: it's used to express siyuations wich are probably to happen in the rpesen or in the future, warnigns advices.

Presen simple y will (if/consequence)

Second Conditional: It's used to talk about unreal or imaginary situations, actions wich are unprobably to happen.

Past simple + would or could