Bonsoir,
1 / Your son may play outside.
2 / He may not be intrested.
3 / They must have left long ago.
4 / The man who was executed last November may be innocent ( "May" est utilisé pour la probabilité et "Be" vient juste du verbe "Etre". )
5 / They can't have seen me .
Si tu as des questions à propos de ca, pas de problème!
Bonne soirée,
MrBuild.