Questions & Answers about Si la tos no para, voy a la consulta.
Why is it spelled si and not sí?
Si without an accent means “if.” Sí with an accent means “yes” (and also functions as a reflexive pronoun in some structures, as in sí mismo). In this sentence you need the conditional “if,” so it’s si (no accent).
Why is the present tense used in both parts (…no para, voy) instead of the future?
In Spanish, real/likely conditions often use the present tense in the si-clause and present or future in the main clause. Using the present in the main clause here (voy) can express a plan or near-future decision: “If the cough doesn’t stop, I’m going (I’ll go).” It can also read as a habitual rule: “If the cough doesn’t stop, I go (to the doctor).” Context decides.
Can I say Si la tos no para, iré a la consulta?
Can I use the future in the if-clause: Si la tos no parará…?
No. In standard Spanish you don’t use the future after si in conditional sentences of this type. Use the present: Si la tos no para…. Reserve the future for the main clause if you want: Si la tos no para, iré…