Несколько лет она играла небольшие

Несколько лет она играла небольшие роли, прежде чем сыграла роль главной героини.

Результаты (английский) 1:

For several years she played small roles before you played the role of the protagonist.

Результаты (английский) 2:

For several years, she played small roles before played the role of the protagonist.

Результаты (английский) 3:

for several years, she played a small role before played the role of the main character.