Serait-il possible de lui parler ?

Question

Pourquoi est-ce que de utilise dans cette phrase--de lui parler--et pas à? Parler à lui ou parler de lui?

Cécile Janty-Davies · Accepted Answer

Bonjour Raymond, 
If you were taking about someone, you would use 'parler de quelqu'un', and it would be -
Serait-il possible de parler d'elle / de lui ?
In this case, it is -
Would it be possible to speak to him ( M. Dupont ) ?
and it will be 'parler à quelqu'un' so the 'lui' in 
....de lui parler 
is an indirect object pronoun which means 'to him' or 'to her'
Hope this helps!

Kim Schwartz · Answer

is it possible to ... possible de ;;;

Kim Schwartz · Answer

I believe there are to situations here .... Possible to ? Possible de and lui parler which is to speak to him ... parler à qqn because of the lui