arbeiten an + dative
to work on
erzählen von + dative
to talk about
fahren mit + dative
to go (by means of)
haben Angst vor + dative
to be afraid of
helfen bei + dative
to help with
halten von + dative
to think of, to value
handeln von + dative
to deal with
träumen von + dative
to dream of
denken an + accusative
to think of
lachen über + accusative
to laugh about
lesen über + accusative
to read about
nachdenken über + accusative
to think about
schreiben an + accusative
to write to
schreiben über + accusative
to write about
sprechen über + accusative
to talk about
warten auf + accusative
to wait for
bitten um + accusative
to ask for
glauben an + accusative
to believe in
sorgen für + accusative
to care for
From:https://www.dbfei.com/Article/deyu/201311/4428.html