“I’m a boy” is a very simple and easy sentence. But if someone listens to this sentence for the first time in his life, it is very difficult to repeat it exactly. This is because he never experienced this kind of sound, and his brain never ordered its vocal organs to form these words. This applies to English native speakers trying to mimic languages which are foreign to them.
Train your ears and tongue with English books.
It is usually accepted that you can comprehend the English that you hear, to the extent that you can speak. Most people assume that if they can listen to English very well, then they can speak English well. But this is a very rare case. Speaking helps listening in most cases. Your speaking and listening skills actually develop together. As for English learners, being able to speak the language first will be a more efficient path to learning English, because practicing speaking is easier than listening. (Have you ever tried to understand Hollywood movies without subtitles in your main language?)
