Questions & Answers about Hän on tyytymätön lyhyempään lauseeseen.
Why is the target of his dissatisfaction (lyhyempään lauseeseen) in the illative case?
This is because of adjective rection. Adjectives expressing satisfaction, dissatisfaction, fatigue, or frustration (like tyytymätön, tyytyväinen, or väsynyt) require the object of that emotion to take the illative ('into') case. While in English you are dissatisfied with a sentence, in Finnish you are dissatisfied into it.
How do we get the form lyhyempään from the basic adjective lyhyt (short)?
First, we form the comparative: lyhyt becomes lyhyempi (shorter). When declining a comparative adjective into the illative case, the -mpi suffix changes its stem to -mpää- before adding the illative ending -n. This results in lyhyempään.
Why does the illative form of lause have so many E's (lauseeseen)?
Lause belongs to the group of Finnish words ending in -e. To find the stem, you double that final e, making it lausee-. When forming the illative case for words where the stem ends in a long vowel, Finnish uses the -seen suffix instead of just doubling the vowel. Therefore, lausee- + -seen = lauseeseen.
If the sentence were positive (he is satisfied), would the grammatical case change?