Jun 20, 2022 - 07:00 AM
First of all, keep in mind that in most general uses, unos/as and algunos/as are usually interchangeable, which is why we didn't think it was necessary to point at their differences in the program at this point: whenever speaking about an indefinite quantity of things in the plural, you can use either unos/as or alguno/as without any problem. So our advice is that you shouldn't worry too much about it until reaching an intermediate or high level.
That said, I've found couple of nice explanations for you if you want to take a look at the more specific uses os each article, so here they go:
Enjoy the rest of the program!