Chapter 51 of 176
2. A policeman _whom_ I met showed me the house.
An Advanced English Grammar with Exercises · George Lyman Kittredge, Frank Edgar Farley
2. A policeman _whom_ I met showed me the house.
_Whom_ is a relative pronoun of the masculine gender, singular number, and third person, agreeing with its antecedent, _policeman_. It is in the objective case, being the direct object of the transitive verb _met_.
3. The corporal, _whose_ name was Scott, came from Leith.
_Whose_ is a relative pronoun of the masculine gender, singular number, and third person, agreeing with its antecedent, _corporal_. It is in the possessive case, modifying the noun _name_.
4. _Whose_ birthday do we celebrate in February?
_Whose_ is an interrogative pronoun in the masculine or feminine gender, singular number, and possessive case, modifying the noun _birthday_.
5. He injured _himself_ severely.
_Himself_ is a compound personal pronoun of the third person, used reflexively. It is of the masculine gender, singular number, and third person, agreeing with its antecedent, _he_. It is in the objective case, being the direct object of the transitive verb _injured_.