Questions & Answers about Hun virker træt i dag.
Virker means seems or appears here. It suggests an impression, not a definite fact.
- Hun virker træt i dag. = She seems tired today.
- Hun er træt i dag. = She is tired today.
So virker is softer and more observational than er.
Virker is the present tense of virke.
A useful pattern in Danish is that the present tense is often formed by adding -r to the infinitive:
- virke → virker
Unlike English, Danish verbs do not change according to the subject:
- jeg virker
- du virker
- hun virker
- vi virker
So hun virker is not a special she form; it is just the normal present tense.