The Latin interrogative pronouns quis, quid ask for nouns. Their declension is one that you should immediately recognize. The only real differences in form between the interrogative pronoun and the relative pronoun are in the singular — the same forms serve for both the masculine and the feminine. In the plural, the forms are identical.

Table 16-2 Declension of the Interrogative quis, quid

The case of the pronoun heading a question anticipates the case of the answer. The number anticipates the answer to be singular or plural.

Nominative: Quis puerīs cū rā bit? (Who will take care of the boys?) Antī nia. (Antonia.)

Genitive: Cuius filius es? (Whose son are you?) Marcī. (Mark's.)

Dative: Cui pecuniam dedē runt? (To whom did they give the money?) Iuliae. (To Julia.)

Accusative: Quīs vī distī ? (Whom did you see?) Multīs servī s. (Many slaves.)

Ablative: Quī occisus est? (By what was he killed?) Sagittā. (By an arrow.)

Ablative: A quī occisus est? (By whom was he killed?) A Hermanī. (By Herman.)