Is sino just a more formal form of pero?
Or are there different meanings and whatnot? We were never really 'taught' sino but it pops up in a lot of our material lately.
Check out this lesson:
3.15 - Prepositions A, Pero, Sino, & Sino Que Go on Vacation
*** Learn Spanish**,up there on the left just under "SpanishDict"
``and open the Lessons 3 section. It's near the bottom. Enjoy
Basically, "pero" is used to indicate an exception to a positive statement and "sino" for an exception to a negative statement.
P.S. The are not interchangeable.