Learn Finnish: Kenet meidän täytyy napata kimppakyytiin tänään? - Who must we pick up for the carpool today?

In a necessity sentence with täytyy, a regular noun object drops its case ending and looks like the nominative (e.g., Meidän täytyy napata Matti). However, personal pronouns and the question word kuka (who) are exceptions. They always keep their special accusative -t ending, so we must use kenet here.

Why is the subject meidän in the genitive case rather than the basic form me?

With necessity verbs like täytyy, the person who has to do the action is always put into the genitive case. Because this is a special sentence structure, the verb täytyy also stays in its fixed third-person singular form and does not take a -mme ending to match meidän.

Doesn't napata usually mean to grab or to catch?

Yes, the literal meaning is to grab, snatch, or catch. However, in colloquial Finnish, it is very commonly used to mean picking someone up or giving them a lift, much like saying you will grab someone for a ride in English.

How is the word kimppakyytiin formed?

It is a compound word made from kimppa (a joint effort, group, or pool) and kyyti (a ride). The -in suffix is the illative case, meaning into, so the phrase literally translates to grabbing someone into the shared ride.