Questions & Answers about Í desember erum við mest heima.
Because Icelandic normally follows a verb-second pattern in main clauses.
That means:
- the first slot can be a time phrase, place phrase, object, etc.
- but the finite verb still comes in the second slot
So when Í desember is placed first, the verb erum must come next:
- Í desember erum við mest heima.
If you start with the subject instead, you get:
- Við erum mest heima í desember.
Both are grammatical, but the first one puts extra focus on December.
Erum is the 1st person plural present tense form of vera, which means to be.
So:
- við erum = we are
Useful present-tense forms of vera are:
- ég er = I am
- þú ert = you are
- hann / hún / það er = he / she / it is
- við erum = we are
- þið eruð = you are (plural)
- þeir / þær / þau eru = they are