Learn Finnish: Ruuhkasta johtuen koukkaamme asemalle napataksemme matkustajan. - Due to the traffic jam, we will swing by the station to pick up the passenger.

The "in order to" structure (napataksemme) takes its object case from the main clause. Since the main verb (koukkaamme) is a standard active verb, the object takes the regular -n ending. If the main clause were a necessity structure like "we have to swing by" (meidän täytyy koukata), a regular noun would drop the -n and become the nominative matkustaja. But remember your current lesson: if the object were a personal pronoun like "him," it would keep its special accusative ending (hänet) regardless of the main clause type!

How does johtuen work with ruuhkasta to mean "due to"?

Johtuen is derived from the verb johtua (to result from). It functions here as a postposition. Because the original verb johtua strongly dictates the elative case (-sta/-stä), the noun preceding it must also be in the elative. That is why we say ruuhkasta johtuen (resulting from the traffic jam).

Can you break down the grammar behind napataksemme (in order to pick up)?

This uses the final structure, which expresses purpose ("in order to"). It is built using the long form of the first infinitive of the verb napata (napatakse-) attached to a possessive suffix. Because the main subject doing the action is "we" (koukkaamme), we add the matching first-person plural suffix -mme, resulting in napataksemme.