He is one of my friends = He is one friend of mine.
Your book looks new,but mine looks old.
名詞性物主代詞在相當(dāng)于形容詞性物主代詞+名詞的時(shí)候就可以用.即：
名詞性物主代詞=形容詞性物主代詞+名詞你是說Whose is that?答語應(yīng)該是It is hers. that要變成it.What's this? It's a book.道理跟上面的問答句式一樣。因?yàn)橹甘敬~有遠(yuǎn)指、中指和近指之分，對(duì)說話者和聽話者而言that 和this可能不同。而it則指說話者和聽話者都明確的它，故而有這樣的變化。