@contrex,
Quote:A good principle of language teaching is to provide the standard form first, and allow the student to discover variant usages, slang, informal constructions and differences of register later, when they have mastered the basics.
That is a good principle, Contrex, for beginners.
From my long experience teaching ESL, I've found that it is imperative to point up to students that there is rarely a "correct" answer. This is often what they've been taught in their homeland schooling.
It is more important that they realize that language isn't simply just a rote, fill in the blanks exercise. These changes to the normal neutral are nuances and language is all about nuance.