1
general::
Phrase(s): keen on doing something
willing or eager to do something. • Dave isn’t very keen on going to the opera. • The children are keen on swimming this afternoon. Shall I take them?, Phrase(s): keen on someone or something [and] keen about someone or something
to be enthusiastic about someone or something. • I’m not too keen on going to Denver. • Sally is fairly keen about getting a new job. • Mary isn’t keen on her new boss.
McGrawhill's American Idioms And Phrasal Verbs