Learn Finnish: Kyllä sinä suoriudut vaikeimmasta ajokokeesta. - You will certainly handle the most difficult driving test.

In this sentence, kyllä is an epistemic adverb used to assert the truth of the statement and reassure the listener. Instead of answering a question, it adds the meaning of "certainly," "surely," or "I am confident that."

Why are the words vaikeimmasta ajokokeesta in the elative case ending in -sta?

The verb suoriutua (to handle, manage, or get through something) requires its object to be in the elative case. In Finnish logic, you don't just handle a test; you successfully manage your way "out of" it.

How does the adjective vaikea (difficult) turn into vaikeimmasta here?

To say "the most difficult," we use the superlative marker -in, making the basic superlative form vaikein. When adding a case ending like the elative -sta, the -in changes to its inflectional stem -imma-, resulting in vaikeimmasta.

What is the base form of ajokokeesta, and why does the stem change so much?

The base compound word is ajokoe (driving test). The second part, koe (test), is an e-stem word. Its inflectional stem changes to kokee-, so attaching the elative ending -sta gives us ajokokeesta.