Questions & Answers about Bušilica i libela su na podu.
Because the subject is bušilica i libela — the drill and the spirit level — which is plural as a whole.
- je = is (3rd person singular)
- su = are (3rd person plural)
So:
- Bušilica je na podu. = The drill is on the floor.
- Bušilica i libela su na podu. = The drill and the spirit level are on the floor.
Because na changes case depending on meaning.
Here, na podu expresses location: something is already on the floor. With location, na takes the locative case.
- pod = floor (dictionary form / nominative)
- na podu = on the floor (locative)
Compare:
- Bušilica je na podu. = The drill is on the floor.
- Stavljam bušilicu na pod. = I am putting the drill onto the floor.
So:
- na + locative = location
- na + accusative = movement onto something