Some adjectives go with certain prepositions. There is no real pattern, you need to learn them as you meet them.
I need some english lessons
Wegen viel Arbeit oder wegen vieler Arbeit?
English speaking practice
The difference between "has + been + p.p" and "had + been + p.p"
LanguageLearningBase.com (short: llb.re) is an online community for learning foreign languages.It represents an open knowledge base. Every member can share and gain knowledge about a new language.