定语从句中关系代词与关系副词的选择
1. 明确关系代词，关系副词在定语从句中的不同作用
关系代词which , that , who在定语从句中作主语或在及物动词或介词后作宾语
关系副词when , where, why在定语从句中作状语，即定语从句中不缺主语、宾语，只缺时间、地点或原因状语
2. 分析句子结构，明确句法成分
关系词在从句中作宾语还是作状语，关键取决于从句中的谓语动词。如果定语从句中谓语动词是及物动词，应观察其后有无宾语。如果没宾语，则应考虑使用能充当宾语的关系代词which或that。如果句子中有宾语，就考虑关系副词when或where等
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