Learn Finnish: Tätä konetta ei koota liukuhihnalla. - This machine is not assembled on the conveyor belt.

In Finnish, the object of a negative sentence is always in the partitive case. Because this machine is not being assembled, the basic form tämä kone changes to the partitive tätä konetta. If the sentence were affirmative ("This machine is assembled"), the object would simply be Tämä kone.

How do we form the negative passive ei koota in this sentence?

The verb is koota (to assemble/gather). To make the affirmative present passive, we would say kootaan (is assembled). To make it negative, we use the negative word ei and drop the personal ending -an from the passive verb, which leaves us with ei koota (is not assembled).

Is it a coincidence that koota looks exactly like the dictionary form of the verb?

It is not a coincidence! For verb types 4, 5, and 6, dropping the passive ending happens to leave you with a word that looks exactly identical to the dictionary form (the basic infinitive). So, koota is both the dictionary form "to assemble" and the negative passive form used after ei.

How does the word liukuhihnalla break down?

It's a compound word made of liuku (slide or glide) and hihna (belt or strap), which together mean "conveyor belt". The ending -lla is the adessive case meaning "on", giving us "on the conveyor belt".