Re-watch your favorite films, and replay your favorite scenes. The more you re-watch, the more you can focus on the speech because you already know what is happening in every scene. Instead of focusing on what is happening, you can give more attention to what you hear. If you don’t have time to re-watch the movie, then listen to the film audio. You can rip audio from films, save them as Mp3 files, and play them while doing other things. Also, mimic the way the actors say the lines by repeating them. You can look at the transcripts while doing so