What hurts more,the pain of hard work or the pain of regret.这句话里后面两个词组充当什么成分?
问题描述：
What hurts more,the pain of hard work or the pain of regret.这句话里后面两个词组充当什么成分?
答
主语成分.即the pain of hard work hurts more.或the pain of regret hurts more.那what是什么成分？what本身就是主语