Ⅰ. hear “听到”强调听的结果。不一定是有意识的。如：
① Can you hear me? 你能听见我说话吗?
② I heard her voice but I didn’t bother to listen to what he was saying. 我听到了她的声音，但并不用心去听她说的是什么。
Ⅱ. listen “听”强调倾听的动作，当然未必能听到什么。是不及物动词，接宾语时常与介词to连用。如：
① Listen! What do you hear what she is saying? 听!你听见她在说些什么?
② We listened attentively for a long time but heard nothing. 我们仔细地听了半天，但什么也没听到。