In English, we use the modal "will" plus a verb to talk about actions that will take place in the future, but in Spanish there’s a future tense with a full set of conjugations for every verb. The uses of these two constructions are very similar.
|Iré al banco mañana.||I will go to the bank tomorrow.|
|¿Estarás a la fiesta?||Will you be at the party?|
El futuro can be used in a si (if, then) clause (conditional sentence), if the condition verb is in the present:
|Si vienes, estaré muy contento.||If you come, I will be very happy.|
|Él nos ayudará si le pagamos.||He will help us if we pay him.|
Test: Future tense