不对,后面多了一个were 应该是 Could you tell me what you were talking about? 这是一个由 what 引导的宾语从句,做 tell 的内容,而 me 则是 tell 的对象. 里面的句式是 tell sb.sth. 而 tell sb.sth.= tell sth.to sb. So 上面的句子 Could you tell me what you were talking about = Could you tell what you were talking about to me 句子中出现were talking 指的就是过去谈论的事情是什么,如果是用 are 的话就指现在谈论的是什么.
