Breakdown of Waarom is jouw collega aan het klagen?
zijn
to be
jouw
your
de collega
the colleague
waarom
why
Questions & Answers about Waarom is jouw collega aan het klagen?
How does the 'zijn aan het' structure work in this question?
Why is jouw collega right in the middle of the verb structure?
In Dutch questions, the parts of a continuous verb act like bookends. The conjugated verb (is) stays near the front. The remaining part (aan het klagen) is pushed to the very end of the sentence. The subject (jouw collega) sits between them.
Why do we use klagen instead of a conjugated form like klaagt?
The aan het structure always requires the full dictionary form of the action verb (the infinitive). Because you already conjugated the helping verb (is), the main action verb stays as klagen.
Could I use je instead of jouw here?
Yes! Jouw is the emphatic form of 'your'. If you want to place special emphasis on the fact that it is your colleague (and not someone else's), you use jouw. If you are just asking a casual question without extra emphasis, je collega is perfectly fine and very common.