有用户朋友在本站“答疑中心”问that是否可以用作关系副词引导定语从句，every day that I escape death中的that I escape death是否是定语从句。具体问题如下：　　

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关于该该问题，我们特请本站特约作者陈根花老师答复如下：　　

在引导定语从句时，that 通常用作关系代词，它在定语从句中主要用作主语或宾语。但事实上，that 有时也可用作关系副词，在意义和用法上与关系副词相同。　　

如世界知识出版社出版的《薄冰高级英语语法》认为：that有时亦可用作表示时间的关系副词，相当于when。该书还指出：下面一些说法都对，但①最为正式，⑦最为非正式：　　

①The day on which she arrived was Thursday.  她到的那天是星期四。　　

②The day which she arrived on was Thursday.  　　

③The day that she arrived on was Thursday.  　　

④The day she arrived on was Thursday.  　　

⑤The day when she arrived was Thursday.  　　

⑥The day that she arrived was Thursday.  　　

⑦The day she arrived was Thursday.  　　

⑧When she arrived was Thursday. 　　

又如外文出版社与商务印书馆联合出版的柯林斯系列语法著作《英语语法系列――连词》认为：有时可以用on the day、at the moment 或 the first time 之类的短语加上 that-关系从句代替连接 when 引导的时间状语从句。该观点的言外之意就是：on the day、at the moment 或 the first time后接that从句是关系从句（即我们通常说的定语从句），但on the day that、at the moment that或 the first time that 在意义上相当于when引导的时间状语从句。　　

再如Michael Swan著的《英语用法指南》(Practical English Usage)认为，在 the day后面用when或that引导定语从句都有可能。该书给出的例句是：　　

Tuesday was (the day) when / that Jake went to London to see Colin. 星期二就是杰克去伦敦看科林的日子。　　

很显然这个例句所包括的可能有：　　

Tuesday was the day that Jake went to London to see Colin. 星期二就是杰克去伦敦看科林的日子。　　

Tuesday was the day when Jake went to London to see Colin. 星期二就是杰克去伦敦看科林的日子。　　

Tuesday was when Jake went to London to see Colin. 星期二就是杰克去伦敦看科林的日子。（句中的when引导的是一个表语从句）