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"Sino" is a form of "sino", a conjunction which is often translated as "but". "Aunque" is a conjunction which is often translated as "even though". Learn more about the difference between "aunque" and "sino" below.
aunque()
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
a. even though
Aunque está lloviendo, el paisaje está precioso.Even though it's raining, the scenery is beautiful.
b. although
Aunque no quedaba mucho tiempo, terminaron la carrera.Although there wasn't much time left, they finished the race.
sino()
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
b. no direct translation
The following examples show ways to translate this word or phrase without using a direct equivalent.
No quiero pizza, sino pasta.I don't want pizza. I want pasta instead.
No quiero ir a la playa, sino al centro histórico.I don’t want to go to the beach. I'd rather go downtown.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).