關系副詞引導的定語從句
　　關系副詞可代替的先行詞是時間、地點或理由的名詞，在從句中作狀語。
　　1. 關系副詞when, where, why的含義相當于"介詞+ which"結(jié)構(gòu)，因此常常和"介詞+ which" 結(jié)構(gòu)交替使用，例如：
　　There are occasions when (on which) one must yield.
　　Beijing is the place where (in which) I was born.
　　Is this the reason why (for which) he refused our offer?
　　關系副詞引導的定語從句
　　關系副詞可代替的先行詞是時間、地點或理由的名詞，在從句中作狀語。
　　1. 關系副詞when, where, why的含義相當于"介詞+ which"結(jié)構(gòu)，因此常常和"介詞+ which" 結(jié)構(gòu)交替使用，例如：
　　There are occasions when (on which) one must yield.
　　Beijing is the place where (in which) I was born.
　　Is this the reason why (for which) he refused our offer?
　　關系代詞在定語從句中作賓語時，可以省略。
　　(1) Behind one door was a hungry tiger (that/which) the guards had put there.
　　(2) The tiger would immediately jump upon the poor man (whom/who) the guards had brought to the arena.
　　3. whose只用作定語,可以用來指人或物; 若指物，它還可以同of which互換, 例如：
　　(1) They rushed over to help the man whose car had broken down.
　　(2) Please pass me the book whose (of which) cover is green.