1.关系代词that引导的定语从句，that指人或指物，在从句中可以作主语、宾语。多数情况下，可与which互换。

　　【真题例句】In a significant tightening of legal controls over the press, Lord Irvine, the Lord Chancellor, will introduce a draft bill that will propose making payments to witnesses illegal and will strictly control the amount of publicity that can be given to a case before a trial begins。(2001完形)

　　【结构分析】本句主干为Lord Irvine will introduce a draft bill…；其中bill由that引导的定语从句that will propose making payments to witnesses illegal and will strictly control the amount of publicity…修饰，在从句中，that指代先行词bill作主语。观察连词and，可确定此从句中并列两个谓语will propose和will control。其中control的宾语the amount of publicity后又跟一个that引导的定语从句that can be given to a case before a trial begins，使用了被动语态，that指代先行词publicity作主语。句首的介词短语In a significant tightening of legal controls over the press作全句的状语。

　　【参考译文】为了有效地加强对新闻界的法律监控，大法官欧文勋爵将引入一项草案。这项草案将提出付款给证人是非法的，并且要严格控制审判前对案件的曝光。

　　2.注意：只能用that作为定语从句的关系代词的情况：

　　(1)在there be 句型中，只用that，不用which；