

Date prisa; si no, perderás el tren.
[ˈdate ˈpɾisa; si ˈno, peɾðeˈɾas el ˈtɾen.]
Hurry up; otherwise, you'll miss the train.
Llámame mañana; si no, te llamo yo.
[ˈʎamame maˈɲana; si ˈno, te ˈʎamo ˈʝo.]
Call me tomorrow; if not, I'll call you.
Lleva el paraguas, porque si no te vas a mojar.
[ˈʎeβa el paˈɾaɣwas, ˈpoɾke si ˈno te ˈβas a moˈxaɾ.]
Take the umbrella, because otherwise you're going to get wet.
"si no" is in the lesson "Conjunctions" (Level 32), along with 13 other useful words. LinDuo has 180 topic lessons like this one, 2,369 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.