Breakdown of De jobbar med sina egna projekt.
de
they
jobba
to work
sin
his/her/its/their own (en-word)
med
with
Questions & Answers about De jobbar med sina egna projekt.
Why is the word for "own" written as egna here?
Egna is the plural form of egen. Because it describes the plural noun projekt, it has to match its number and take the plural -a ending.
I learned that adjectives always get an -a after a possessive pronoun. Is egna just following that rule?
No, egen is a famous exception to that rule! Most adjectives get a forced -a after a possessive word regardless of the noun (like mitt nya projekt). But egen still changes to match the noun's gender and number. If it were one project, it would be sitt eget projekt, but here it's plural, so it correctly becomes sina egna projekt.
Why do we use sina instead of deras for "their"?
Sina is the reflexive possessive pronoun. You use it because the projects belong to the subject of the sentence, De (they). If you wrote deras, it would mean they are working on some other group's projects.
Why is projekt in the indefinite form without an ending?
In Swedish, nouns must be in the indefinite form when they come right after a possessive pronoun like sina. Also, since projekt is an ett-word that ends in a consonant, its indefinite plural form is exactly the same as its singular form.