Questions & Answers about Der Preis sinkt um drei Euro.
Because der Preis is the subject of the sentence, and subjects are in the nominative case.
- der Preis = the price
- It is the thing that is doing the action: the price is going down.
You would use den Preis only if Preis were a direct object in the accusative case.
sinkt is the 3rd person singular present tense of sinken, which means to sink, to drop, or to go down.
Here it is used in an everyday economic sense:
- Der Preis sinkt. = The price is falling / going down.
German often uses sinken for things like:
- prices
- temperatures
- numbers
- levels