By Abstract nouns, Genitives

Hello Hela 1) So what we call "the genitive case" is the apostrophe s and the relative whose, and the "possessive case" is any expression with of to express possession? Would you please give me sentences where we CANNOT use the 's but rather the of form? — I would use "genitive" to describe the...

Dear MrP and all the other teachers, 1) So what we call "the genitive case" is the apostrophe s and the relative whose, and the "possessive case" is any expression with of to express possession? Would you please give me sentences where we CANNOT use the 's but rather the of form? 2) Would you...