Learn Hardcore Icelandic: Ég vinn þegar dagurinn er skær.

The sentence is composed of a main clause and a subordinate clause. The main clause is "Ég vinn" ("I work"), and the subordinate clause is "þegar dagurinn er skær" ("when the day is bright"). The subordinate clause, introduced by þegar, gives the time context for the main action.

What role does the word þegar play in this sentence?

The word þegar functions as a temporal subordinating conjunction meaning "when." It connects the subordinate clause "dagurinn er skær" to the main clause, specifying the time at which the action in the main clause occurs.

Why is the noun dagur presented as dagurinn in the sentence?

In Icelandic, a definite noun is formed by adding a suffix to the bare noun. Changing dagur ("day") to dagurinn means "the day." In this sentence, the definite form is used to specify a particular day described as bright.

Why is the adjective skær used in its base form in the clause "dagurinn er skær"?

When an adjective is used predicatively after the copular verb er ("is"), it is typically not fully declined to show agreement with the subject. Therefore, skær remains in its base form to describe the state of dagurinn ("the day") as bright in a predicative construction.