of s Phrases combining “of” with a noun followed by “S” may seem redundant,since both indicate possession; nevertheless, “a friend of Karen’s” isstandard English, just as “a friend of Karen” and “Karen’s friend” are. Facebook Twitter Google + Do you make these 10 mistakes? in tact vs intact writting vs writing ninty vs ninety woman vs women buttox vs buttocks basicly vs basically practicle vs practical gaurd vs guard extend vs extent swam vs swum