There are people who have doubts about using the article THE or not using it so, as THE.CAT is much related to the THE article it is a pleasure to write this post about the use of this English article.
Before continuing just let me tell you that in Catalan and other languages related to the Latin language we have two articles instead of just THE. In Catalan we have EL and LA. So we say EL FULL for THE SHEET and we say LA FULLA for THE LEAF.
But if you are just interested in the English THE article you can visit the following BBC link: http://www.bbc.co.uk/news/magazine-18233844