Questions & Answers about He ovat tukeneet yhdistystä ja lahjoittaneet rahaa.
Why do both tukeneet and lahjoittaneet end in -neet?
They are in the plural active past participle form because the subject He (they) is plural. To form this for type 1 verbs like tukea (to support) and lahjoittaa (to donate), you take the strong stem (tuke- and lahjoitta-) and add -neet. Together with the helper verb ovat, they form the perfect tense (have supported, have donated).
Why is the object yhdistystä in the partitive case instead of the accusative?
Is rahaa also in the partitive case because of its verb?
No, lahjoittaa (to donate) is not a strict partitive verb. Here, raha (money) is in the partitive case (rahaa) because it is an uncountable mass word. They donated an unspecified amount of money, or some money.
Why is there only one ovat when there are two past tense verbs?