Learn Finnish: Asiantuntijan tulee tarkistaa, että kirjanpito on täsmällinen. - The expert must check that the accounting is exact.

This sentence uses the formal necessity construction: genitive subject + tulee + 1st infinitive (tarkistaa). It works grammatically just like the more common täytyy or pitää constructions, requiring the person who must do something to be in the genitive case.

How is tulee tarkistaa different in tone from täytyy tarkistaa?

While both mean 'must check', using the verb tulla for necessity makes the sentence sound much more formal, official, or authoritative. You will frequently see it in legal texts, strict corporate guidelines, and formal instructions, but rarely in casual, everyday speech.

If the expert was checking 'a report' instead of an että clause, what case would the report be in?

It would be in the nominative-like accusative (often just called the basic form or nominative), for example: Asiantuntijan tulee tarkistaa raportti. A major rule with necessity verbs like tulla, täytyy, and pitää is that their total objects never take the genitive -n ending. Because the object in this sentence is an entire että subclause, this object rule doesn't visibly apply here.

What is the literal breakdown of the compound word kirjanpito?

It is made of kirjan (the genitive form of kirja, meaning 'of the book') and pito (the noun form of pitää, meaning 'keeping' or 'holding'). It literally translates to 'bookkeeping', which serves as the exact equivalent of 'accounting' in English.