would you do
Le pourrais-tu, le ferais-tu ?
Could you do it? Would you do it?
Pourquoi ferais-tu une telle chose ?
Why would you do such a thing?
Ne le ferais-tu pas, parce qu'il le dit ?
Wouldn't you do it because he says so?
Pourquoi ferais-tu cela sans nous le dire ?
Why would you do that without telling us?