Learn Hardcore Icelandic: Kennarinn lokaði hurðinni og kennslustundin hófst. - The teacher closed the door and the lesson began.

Because Icelandic marks the definite article as a suffix. Kennari means “a teacher” (indefinite); Kennarinn means “the teacher” (definite). Here -inn is the masculine nominative singular definite ending.

Why is hurðinni in the dative case?

The verb loka (“to close”) governs a dative object in Icelandic. So “the door” must be in the feminine singular dative form, which is hurðinni (hurð + -inni).

How is the past tense lokaði formed from loka?

Loka is a weak (regular) verb. Its past tense is formed by adding -aði to the stem: loka → lokaði (“closed”). The inserted ð helps with pronunciation between vowels.

What does kennslustundin mean and how is it built?

It’s a compound: kennsla (“teaching”) + stund (“hour, period”) + -in (definite article). So kennslustundin literally means “the teaching period” – i.e. “the lesson” or “class session.”

Why does the second clause read kennslustundin hófst instead of hófst kennslustundin?

Icelandic main clauses follow the V2 (verb-second) rule: the finite verb must occupy the second position. Here, kennslustundin is the first constituent of the new clause (after the conjunction og), so hófst (“began”) comes second.

What kind of verb form is hófst?

Hófst is the past tense medio-passive form of hófa (“to begin, commence”). It’s often called the “middle” or “passive-like” form and translates as “it began” or “it was begun.”