The use of good English, whilst being something that requires a bit of effort, is also something to which one needs to be exposed. If Pablo's background is such that this hasn't happened, it is not entirely his fault and he has, at least, had the magnanimity to concede this and apologise.
Pablo, a number of people have suggested an area in your education which needs addressing. This will best be achieved by extensive reading which you will obviously have to do anyway for background information and studying. Please try to take on board the way the language has been structured and soon, with a bit of effort, you too can be become as anally-retentive as some of the pedants on here!
Cheers
Whirls