关系副词在定语从句中做状语，关系代词在定语从句中做主语后者宾语。关系副词和关系代词主要的区别是where、when、why=介词+which。
关系代词在定语从句中用作介词宾语时，介词既可置于从句之首，亦可置于从句之末。但以置于从句之首较为正式。如：This is the book for which you asked. 这是你所要的书。(关系代词用作介词for宾语，之首，即which之前)This is the book which you asked for. 这是你所要的书。(介词for置于从...
1.7关系代词和关系副词的区别 关系代词在从句中作主语、宾语、定语;关系副词在从句中只能作状语。 试比较:The companywhichwe visited the day before yesterday is not far from here. We shall go to the factorywhereyour father has worked for many years. 1.8 which和as在定语从句中...