1.在大多數(shù)名詞末加“'s” the boy's toy, men's work 2.以 s結(jié)尾的復(fù)數(shù)名詞直接加“'” the students' reading room 3.以 s結(jié)尾的單數(shù)名詞加“'” Dickens' novels the actress' performance 4.合成名詞在最后一個詞上加“s” her brother-in-law's piano. Somebody else's books. (重要!) 【金牌重點】：除用于有生命的人外，“'s”格還可用于度量衡、地域、天體及一些習(xí)語中： an hour's drive, a mile's journey ten pounds' weight. Beijing's weather the earth's surface a stone's throw 投石之距離 at one's wits end 智窮計盡 to one's heart's content 盡情地 by a hair's breadth 千鈞一發(fā) at a snail's pace 緩慢地 5.雙重所有格： 如果被修飾的名詞前有不定冠詞、不定代詞、指示代詞、疑問代詞修飾。則要采用雙重所有格。 a friend of mine (名詞性物主代詞) a child of hers the love poems of your sister's 注意區(qū)別： 1） a portrait of her mother 她母親的畫像(畫中人) 2） a portrait of her mother's 她母親擁有的畫像中的一幅(不一定是她母親的畫像)