名词从句名词性从句包括: 主语从句、表语从句、宾语从句和同位语从句。引导这些名词性从句的关联词包括：1)从属连词that, if, whether；(不做成分)2)连接代词who, whoever, whom, whomever, which, whichever, what, whatever, whose；3)连接副词where, when, why, how。（2，3，充当一定的成分） e.g. That Owen should have married his cousin is not at all surprising. The fact is that he didnt go to the dinner party. I dont know if he will attend the meeting. Have you heard the news that Mary is going to marry Tom? 你听说玛丽要和汤姆结婚的消息了吗？（that
