... to the end of the clause This is commonly done in conversation and "who" then finally take the place of " whom" Ex: Mr Richard , who i was working for , was generous If the clause contains the ... Ex : Peter , who/whom I admire , is going to visit the university next week But non-defining clauses , coming later in the sentence , after the object of the main verb or after a preposition+noun ... b/Object :who/whom -We used "who/whom " as the subject of the main clause although "whom" is more formal and rarely used in spoken English The pronoun can't be omitted...