Breakdown of Ég þarf að þvo handklæðið mitt.
ég
I
að
to (infinitive marker)
þurfa
to need
minn
my (m, f, n: minn, mín, mitt)
Questions & Answers about Ég þarf að þvo handklæðið mitt.
Why is the word for "my" mitt here instead of minn?
Possessive pronouns must match the gender, number, and case of the noun they belong to. The word handklæði (towel) is a neuter noun. Because it is the direct object being washed, it is in the accusative case. The neuter, singular, accusative form of "my" is mitt.
Why does handklæðið have the ending -ið ("the") if the sentence says it is "my" towel?
In Icelandic, when you place a possessive pronoun like mitt after a noun, the noun must have the definite article attached to it. You are literally saying "towel-the my" (handklæðið mitt).
How do we know handklæðið mitt is in the accusative case?
The verb þvo (to wash) forces the thing being washed (the direct object) into the accusative case. However, for neuter words like handklæði (and neuter pronouns like mitt), the accusative form looks exactly the same as the basic nominative form, so it doesn't visibly change here!
Why do we need the word að between þarf and þvo?