can movie really help?

火中有火

2樓英文都好似有D錯 絕對係典型的港式英語.__.  不過唔想改完又錯俾人笑SO唔改啦

Personally, watching western movies is a way we can hear how native English speakers speak.
So I think it helps for sure.
However, there's one thing you must do, that is trying to speak like them, or it will be too late when you find that you are not speaking as naturally as you wish.