(1.) quī AND quis.
[681]. The stem qui-, or quo-, quā-, is used in three ways: as a relative, who, which; as an interrogative, who? which? what? as an indefinite, any.
[682]. (a.) The relative quī, who, which, is declined as follows:
| Singular. | Plural. | |||||
|---|---|---|---|---|---|---|
| Masc. | Fem. | Neut. | Masc. | Fem. | Neut. | |
| Nom. | quī | quae | quod | quī | quae | quae |
| Gen. | cuius | cuius | cuius | quōrum | quārum | quōrum |
| Dat. | cui | cui | cui | quibus | quibus | quibus |
| Acc. | quem | quam | quod | quōs | quās | quae |
| Abl. | quō | quā | quō | quibus | quibus | quibus |
[683]. (b.) The interrogative adjective quī, quae, quod, which? what? is declined like the relative quī ([682]).
[684]. The interrogative substantive has in the nominative singular quis, quid, who? what? the rest is like quī ([682]).
In old Latin, quis is both masculine and feminine, but a separate feminine form quae is used three or four times.
[685]. quis interrogative is sometimes used adjectively with appellatives: as, quis senātor? what senator? And quī is sometimes used substantively: as, quī prīmus Ameriam nūntiat? who is the first to bring the tidings to Ameria?
[686]. (c.) The indefinite quis or quī, one, any, has the following forms:
quis and quid masculine and neuter substantives, quī and quod adjectives; feminine singular nominative and neuter plural nominative and accusative commonly qua, also quae. The rest is like quī ([682]).