aangezien means “since / as (formal)”. Starts a sub-clause and sends its verb to the very end.
Subordinating · Onderschikkend
Aangezien het laat is, ga ik naar huis.
Since it's late, I'm going home.
Aangezien hij ziek is, komt hij niet.
As he is sick, he's not coming.
Drag scrambled words into the right Dutch order and master inversion and the verb-final rule.