Usages of um
Hún vaknar seint um helgar.
She wakes up late on weekends.
Hún selur bækur á markaðnum um helgar.
She sells books at the market on weekends.
Foreldrar mínir leyfa mér að vaka lengur um helgar.
My parents allow me to stay up longer on weekends.
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We have an entire course teaching Icelandic grammar and vocabulary.