现在外国人说你好,是不是都不说Hello 和 How are you

为什么外国经典电影里说你好都用how do you do?而现在几乎都用hello或nice to meet you? 外国人对你说 how are you hello hello how are you 和外国人对话 他说：how are you?我说：fine,thank you.and you? hello how are you A：HELLO!How are you? hello how are you 儿歌 Hello,how are you doing? hello linda how are you hello how are you 是什么意思 How are you?和HELLO有什么区别? How are you?Are you fine?Hello,How are you?