Sometimes I still get confused about esto verus este.
For example, if someone is explaining a situation to me, and I want to say "this is a problem", I'd be tempted to say "Esto es un problema".
But if I wanted to say "This is a serious problem" I think I have to instead say "Este es un problema grave".
Is that right?
Can someone shed some light on why these are different and what some general rules are regarding which one to use?