pagrindinė

In a sentence

• Pagrindinė šio namo problema yra sena stogo danga.

  The main issue of this house is the old roof covering.

  In this sentence, 'pagrindinė' is an adjective describing the noun 'problema' (issue), indicating that it is the primary or most important one.

• Mane labiausiai domina pagrindinės mokyklos mokinių pasiekimai.

  I am most interested in the achievements of the primary school students.

  Here, 'pagrindinės' is used as an adjective modifying the noun 'mokyklos' (school), specifying it as 'main' or 'primary' (referring to an institution of elementary education).

• Vienas pagrindinių klausimų susirinkime buvo aplinkos apsauga.

  One of the main topics of the meeting was environmental protection.

  In this example, 'pagrindinių' functions as an adjective qualifying the noun 'klausimų' (topics/questions) in the genitive plural form, emphasizing their significance.