Present simple versus present continuous.

Hello, everyone.
Here's a link to a page I find very useful if you have a grammar question. The explanations are clear, and you can practise too, so this is a good page to copy to your 'Favoritos'. Have a look.

First, the theory.

http://www.perfect-english-grammar.com/present-simple-or-present-continuous.html

Then the  practice.

http://www.perfect-english-grammar.com/present-simple-present-continuous-1.html