To express the possibility of something happening in the future depending on a condition that has a high probability of being met, we use these structures with the conjunction si (if):
Si (if) +present tense, ... present tense
Si (if) +present tense, ... simple future tense
Using the present or future tense in the main clause does not change the meaning of the sentence.
Have a look and listen to these examples:
Also bear in mind that the order can also be altered: the main clause can come before the condition clause without changing the meaning:
The use of deber/tener que in El Condicional:
Sometimes, we combine si + El presente, deber/tener que in El Condicional. See some examples:
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Examples and resources
Si cambian la fecha del examen, tendrían que avisar con tiempo.If they change the date of the exam, they'd have to warn [us] in time.
Si quieres este trabajo, tendrías que llevar este uniforme todos los días.If you want this job, you'd have to wear this uniform everyday.
