Mjólkin súrnar hratt ef hún er ekki í ísskápnum.
The milk turns sour fast if it is not in the fridge.
Breakdown of Mjólkin súrnar hratt ef hún er ekki í ísskápnum.
vera
to be
hún
she
ekki
not
í
in / into / to (before the hour, in telling time) / per (in frequency expressions)
mjólkin
the milk
hratt
fast
ef
if
ísskápurinn
the fridge
súrna
to turn sour
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