to study english well is a procedure of learning and self-proving.I have a coviction that english-learning is a general way to be a better man.
first you must take your time and patience to learn english. so this is the first step to be a successful man. it is said that dilligence is the procedual virturethat is what ever you do you must work hard.
second if you want speak a quiet good oral englishit takes your courage and determiantion to speak it out either with a native speaker or just your class-mate.
thirdnever just doing the exersices given by your teacher. language is a practical career.you will never know your ability until you have try it in the practice. someday at the airport in U.S you ask a native speaker a question and he can understand you meanwhile you can understand him and then i can say you learn english well.