So, how many years is necessary study to learn a properly english I personally had been studied more than 5 years in differents times, for me was very important study in California/ U.S.A for 1 month and a half and in Sydney/Australia for 4 months. Specially when we don´t have reference of how to speak this new language is necessary mantain focus in learn a little bit day by day. Is problably imposible learn a new language properly in 1 year but the most important will be try to speak with native people to learn expression and new words.