Questions & Answers about Mun on vaikea omaksua tää uusi käytäntö.
Why do we use mun (genitive) here instead of mä or mulla?
This sentence uses the Genitive experiencer structure. When you express an evaluation like 'It is [adjective] for [someone] to do [something]', the person experiencing the feeling is placed in the genitive case. Here, the colloquial mä (I) becomes mun (minun).
Could I say Mun on vaikeaa... using the partitive case instead of vaikea?
Yes, you can! In this specific structure (Genitive + olla + Adjective + 1st Infinitive), the adjective can usually be in either the nominative (vaikea) or the partitive (vaikeaa). Both are grammatically correct and commonly used by native speakers.
Why is the object tää uusi käytäntö in the nominative case instead of having the -n accusative ending?
This is a major rule for Finnish objects! Because the sentence has a genitive subject (mun) and no standard nominative subject, the object of the infinitive takes the nominative-like form (meaning no -n ending). If the sentence had a normal subject, like 'I adopt this new practice' (Mä omaksun tän uuden käytännön), the -n ending would be required.
What kind of 'adopting' does omaksua refer to?