Questions & Answers about Konewka stoi za domem obok grabi.
Because after za in a location meaning, Polish uses the instrumental case.
Here, za domem means behind the house as a fixed location, so dom changes to domem.
A very useful contrast is:
- za domem = behind the house / located behind the house
- za dom = to behind the house / movement to that place
With an inanimate masculine noun like dom, the accusative form looks the same as the basic dictionary form, so:
- Konewka stoi za domem. = The watering can is behind the house.
- Idę za dom. = I’m going behind the house.
So the form domem tells you this is about position, not movement.
Because obok requires the genitive case, and grabi is the genitive form of grabie.
The noun grabie is a special kind of noun called plural-only (pluralia tantum). Even when it refers to one rake as an object, grammatically it behaves like a plural noun.
So:
- basic form: grabie
- after obok: grabi
Compare:
- Widzę grabie. = I see the rake / rake(s).
- Konewka stoi obok grabi. = The watering can is next to the rake / rake(s).
So grabi is not random—it is there because obok needs the genitive.