Hello Chema,
The more we advance, the less we use this website, do you realize?
Well, I think it's still a good resource for you to surf the web looking for English articles, information, grammar, exercises, and any other thing.
There are few things you can't find in the web, because most people share something in this media.
There has been some references to this topic during our classes. QUANTIFIERS. And I think it's a good moment to take a good look to them.
So here I leave you a link in which you can access to a good introduction.
You'd better have look!
As always, more exercises and some explanations will follow in class.
Regards.
