Breakdown of Jos erehdyt tästä kopiosta, kokoelma koostuu vain väärennöksistä.
tämä
this
vain
only
jos
if
kokoelma
collection
väärennös
forgery
kopio
copy
koostua
to consist
erehtyä
to be mistaken
Questions & Answers about Jos erehdyt tästä kopiosta, kokoelma koostuu vain väärennöksistä.
Why is tästä kopiosta in the elative case here?
The verb erehtyä (to be mistaken, to err) requires the elative case (-sta/-stä) when you are expressing what someone is mistaken about. Even though it's not a physical separation, this mental "straying from" the truth triggers the same elative rection you are practicing in this lesson.
Does koostua also require the elative case?
Yes! Just like verbs of separating and depending, verbs describing what something is made of or consists of take the elative case. Here, the collection "consists of forgeries", so the verb koostuu forces the word for forgeries into the elative: väärennöksistä.
How do we get from the basic dictionary form of "forgery" to väärennöksistä?
The dictionary form is väärennös. Nouns ending in -os/-ös change to -kse- in their stem, giving us väärennökse-. To make it plural, the -e- is dropped before the plural -i-, creating the plural stem väärennöksi-. Finally, we add the elative ending -stä to get väärennöksistä.
Is väärennös related to the word väärä (wrong)?
Exactly! This is a great example of Finnish word derivation. It starts with the adjective väärä (wrong, false), which turns into the verb väärentää (to falsify, to forge). By adding the noun-forming suffix -ös to the verb stem, we get väärennös (a forgery).
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