You tu vs ud.

Just a suggestion. I have a difficult time with indirect object pronouns (making my ignorance of English grammar apparent) and find it easier to memorize constructions until they come naturally rather than try to figure out whether a pronoun is direct/indirect. i.e. Tanto tiempo que no te he visto - I thought te was a direct object whereas it would be apparent if the formal you was used instead. I don't think I'd be using the familiar much if I visited Spanish speaking countries, and think maybe it would be helpful to beginning students to include both forms of the second person singular from the start. Thanks.[/i]