1、that 的比較
定語從句：This is the book （that I bought yesterday.）其中that=the book充當bought的賓語。
同位語從句：The fact （that women can work as well as men） is clear.其中the fact =that women can work as well as men . that不充當任何成分，且不能省略。
2、who 的比較
定語從句： The man （who came to our school） is Mr. Wang.其中who = The man在從句中充當came 的主語。
同位語從句：The question （who should go abroad） hasn’t been decided yet.其中The question =who should go abroad.其中who充當should go 的主語。
3、whom 的比較
定語從句 : The girl (whom I met) is Lucy.其中whom =The girl 在定語從句中充當met的賓語。
同位語從句：You haven’t answered my question（whom you told the secret to ）其中my question = whom you told the secret to .其中whom充當介詞to 的賓語。
4、whose 的比較
定語從句 : I sat next to a girl （whose name was Diana）.其中whose=a girl +的 ，在從句中充當name的定語。
同位語從句：I have no idea （whose watch it is）.其中idea =whose watch it is 其中whose充當watch的定語。
5、which 的比較
定語從句 : I like the book （which you bought yesterday）.其中which=the book,在從句中充當bought的賓語。
同位語從句：I have no idea （which one I should choose）. 其中idea = which one I should choose. which 充當one的定語。
6、where 的比較
定語從句 :This is the place （where I was born）.其中where=在+the place ，在從句中充當was born 的狀語。
同位語從句：We have no information （where he lives）.其中information =where he lives. where在從句中充當lives的狀語。
7、when 的比較
定語從句 :I remember the day （when I first met him）.其中when=在+the day ，在從句中充當met 的狀語。
同位語從句：There is a problem （when you will be back ）.其中problem =when you will be back. when在從句中充當be back的狀語。
8、why 的比較
定語從句 :Can you tell me the reason （why you lied to me）?其中why=因為+the reason ，在從句中充當lied 的狀語。
同位語從句：I have no idea （why this game is so popular online）.其中 idea = why this game is so popular online . why在從句中充當is的狀語。
1、that 的比較
定語從句：This is the book （that I bought yesterday.）其中that=the book充當bought的賓語。
同位語從句：The fact （that women can work as well as men） is clear.其中the fact =that women can work as well as men . that不充當任何成分，且不能省略。
2、who 的比較
定語從句： The man （who came to our school） is Mr. Wang.其中who = The man在從句中充當came 的主語。
同位語從句：The question （who should go abroad） hasn’t been decided yet.其中The question =who should go abroad.其中who充當should go 的主語。
3、whom 的比較
定語從句 : The girl (whom I met) is Lucy.其中whom =The girl 在定語從句中充當met的賓語。
同位語從句：You haven’t answered my question（whom you told the secret to ）其中my question = whom you told the secret to .其中whom充當介詞to 的賓語。
4、whose 的比較
定語從句 : I sat next to a girl （whose name was Diana）.其中whose=a girl +的 ，在從句中充當name的定語。
同位語從句：I have no idea （whose watch it is）.其中idea =whose watch it is 其中whose充當watch的定語。
5、which 的比較
定語從句 : I like the book （which you bought yesterday）.其中which=the book,在從句中充當bought的賓語。
同位語從句：I have no idea （which one I should choose）. 其中idea = which one I should choose. which 充當one的定語。
6、where 的比較
定語從句 :This is the place （where I was born）.其中where=在+the place ，在從句中充當was born 的狀語。
同位語從句：We have no information （where he lives）.其中information =where he lives. where在從句中充當lives的狀語。
7、when 的比較
定語從句 :I remember the day （when I first met him）.其中when=在+the day ，在從句中充當met 的狀語。
同位語從句：There is a problem （when you will be back ）.其中problem =when you will be back. when在從句中充當be back的狀語。
8、why 的比較
定語從句 :Can you tell me the reason （why you lied to me）?其中why=因為+the reason ，在從句中充當lied 的狀語。
同位語從句：I have no idea （why this game is so popular online）.其中 idea = why this game is so popular online . why在從句中充當is的狀語。