In this lesson we’ll learn about interrogative determiners. Interrogative determiners (determinantes interrogativos) are determiners we use to formulate direct or indirect questions or exclamations. There are only two of them, but they’re very handy determiners indeed!
Qual is the singular form equivalent to “which” in English, for both masculine and feminine. Example:
Ela visitou qual museu? Which museum did she visit?
Quais is the plural form of qual. Example:
Eles foram a quais festivais? Which festivals have they been to?