French language Q&A Forum

Bonjour,

The online Collins dictionary gives the translation of 'être inconnu(e) à qn' meaning to be unknown to someone, which I used in the response. The correction provided for 'inconnues de' and this was confirmed by my big Collins Robert dictionary. Could anyone shed some light on the difference between à or de in this context please?

Merci beaucoup :-) 

“Un bon moyen de mettre la finance au service d'un projet de société alternatif.”

 —-

Is the adjective “alternatif” in the masculine form because it’s linked with the masculine noun “projet”? Is there a chance that it should be linked with the female noun “société” and therefore be “alternative”, or is it obvious to French speakers that this would not be the case?

 Thanks, Brian

Après _être rentrée_chez elle, Martine a fait une sieste.

After going back home, Martine had a nap

Elles rentrent après que le bus les a déposées.

''They go home after the bus has dropped them off.'' ?

Why does one sentence require ‘chez elle’ and the other not?