We’ll go to hear the famous singer (whom / who / that) we have often talked about. We’ll go to hear the famous singer about whom we have often talked. The manager whose company I work in pays much attention to improving our working conditions. The manager in whose company I work pays much attention to improving our working conditions. 注意： 1.含有介词的短语动词一般不拆开，介词仍放在短语 动词的后面。如：look for, look after, take care of 等。 This is the watch (which / that) I am looking for.