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 Amalia va al mercado, comprará pescado fresco.If Amalia goes to the market, she will buy fresh fish.
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.
