Answers
Dec 08, 2014 - 12:15 PM
Hi; as far as I can recall, Fluenz teaches that they are interchangeable. However, I googled the question, and apparently there are some subtle differences. See http://spanish.about.com/od/translationsfromenglish/a/algunos-unos.htm.
Dec 08, 2014 - 04:14 PM
Many thanks.