Breakdown of Það er asnalegt að birnirnir skuli róta í ruslatunnunum okkar.
vera
to be
það
it / there (existential) / the one (n)
í
in / into / to (before the hour, in telling time) / per (in frequency expressions)
að
that (conjunction)
Questions & Answers about Það er asnalegt að birnirnir skuli róta í ruslatunnunum okkar.
Why do we use skuli here instead of just putting the main verb in the subjunctive (að birnirnir róti)?
Using the subjunctive skuli (from skulu) in an að clause emphasizes subjective judgment, surprise, or emotion. The speaker is stressing how absurd or foolish the situation is. It translates perfectly to the English use of 'should' in phrases like 'It is silly that they should do that.'
What grammatical form is skuli here?
It is the present subjunctive form of the modal verb skulu. It is conjugated in the third-person plural to match the subject of the clause, birnirnir (the bears). When skulu is used to express subjective surprise or evaluation, it always takes the subjunctive mood.
birnirnir means 'the bears,' but the singular is björn. What causes this drastic spelling change?
This is a classic vowel shift where the root vowel ö in björn shifts to i in the plural nominative (birnir). This is a predictable pattern for several masculine nouns ending in -örn (for example, örn becomes ernir). The -nir at the very end is the attached plural definite article.
Why is ruslatunnunum (the trash cans) in the dative case?