I've met an exercise:
Wie lange - die Führung im Museum - dauem
I have to build a question of these parts. I know the sense of dauem.
Wie lange dauert die Führung im Museum?
It means to last, but I cannot find any information on the Internet about dauem form. Is it a typo? Everywhere Dauern word is used but not dauem. German words could have a lot of suffixes where are the tables describing all possible combinations?