Three interrogative pronouns are distinguished for Greek.
| Interrogative | Gr. example | Gr. tag |
| ti | PnIr03CoNvIc | |
| poios | PnIr03MaSgNm | |
| posos | PnIr03MaSgNm | |
As indicated by the values of its tag, the first pronoun, `ti', is indeclinable, while the other two are inflected for gender, number and case, agreeing with the object they refer to. They are all used both as pronouns and pronominal adjectives.