Mixed-gender subject agreement

In Polish, plural past tense verbs have two forms: the virile (męskoosobowy) for groups including at least one man, and the non-virile (niemęskoosobowy) for everything else.

When a compound subject consists of mixed genders, the verb must resolve to the virile form. Notice how the mixed-gender subjects below trigger virile past tense verbs, which typically end in -li (like przyszli or wyszli).

My brother and his new partner came to the reception.
Mój brat i jego nowa partnerka przyszli na przyjęcie.
Your partner and sister left the reception early.
Twój partner i siostra wyszli wcześnie z przyjęcia.

This rule also applies to adjectives describing the group. A mixed-gender group takes the virile plural adjective ending (such as nieobecni).

Anna and Piotr were absent, so they did not participate in the ceremony.
Anna i Piotr byli nieobecni, więc nie uczestniczyli w ceremonii.

Whether using names or general nouns, the presence of at least one male subject guarantees the virile plural form for all past tense verbs and adjectives.

My father and mother raised a toast to health.
Mój ojciec i matka wznieśli toast za zdrowie.
The actor and the actress came to the reception and raised a toast.
Aktor i aktorka przyszli na przyjęcie i wznieśli toast.