whose、of which和of whom都是定語從句中的引導(dǎo)詞
of which 指物,of whom 指人,而whose既可指物又可指人 .所以指物的時候,可以用whose也可以用of which 代替；指人的時候可以用whose,當(dāng)然可以用of whom 代替.
其實whose、of which和of whom的使用比較特殊,成分不是簡單地主語賓語表語等,而是這個語中的一個名詞所屬.（就成分而言,和常規(guī)的只用which,who,whom或that 略有區(qū)別,因為常規(guī)的which,who,whom或that 可以較明確的指明它們在從句中的成分.比如 this is the book which i bought yesterday.which 做從句的賓語）
而且寫出來,多是非限定性定語從句,即加一個“,”.
of whom ：I knew Li Ming,whose uncle is a teacher.
I knew Li MIng,the uncle of whom is a teacher.
源自 兩個簡單句或一個并列句
I knew Li Ming.His uncle is a teacher.
I knew Li Ming and his uncle is a teacher.
of which I saw the montain,whose top was covered with snow.
I saw the mountain,the top of which was covered with snow.
同樣源自 兩個簡單句或一個并列句
I saw the mountain.The top of mountain was covered with snow.
I saw the mountain.and the top of it was covered with snow.
或I saw the mountain.and its top was covered by snow.