I can leapfrog you can leapfrog he can leapfrog we can leapfrog you can leapfrog they can leapfrog
Forme en V-ing
I can be leapfroging you can be leapfroging he can be leapfroging we can be leapfroging you can be leapfroging they can be leapfroging
Perfect
I can have leapfroged you can have leapfroged he can have leapfroged we can have leapfroged you can have leapfroged they can have leapfroged
Perfect en V-ing
I can have been leapfroging you can have been leapfroging he can have been leapfroging we can have been leapfroging you can have been leapfroging they can have been leapfroging
Négation
Forme simple
I can't leapfrog you can't leapfrog he can't leapfrog we can't leapfrog you can't leapfrog they can't leapfrog
Forme en V-ing
I can't be leapfroging you can't be leapfroging he can't be leapfroging we can't be leapfroging you can't be leapfroging they can't be leapfroging
Perfect
I can't have leapfroged you can't have leapfroged he can't have leapfroged we can't have leapfroged you can't have leapfroged they can't have leapfroged
Perfect en V-ing
I can't have been leapfroging you can't have been leapfroging he can't have been leapfroging we can't have been leapfroging you can't have been leapfroging they can't have been leapfroging
Forme interrogative
Forme simple
can I leapfrog? can you leapfrog? can he leapfrog? can we leapfrog? can you leapfrog? can they leapfrog?
Forme en V-ing
can I be leapfroging? can you be leapfroging? can he be leapfroging? can we be leapfroging? can you be leapfroging? can they be leapfroging?
Perfect
can I have leapfroged? can you have leapfroged? can he have leapfroged? can we have leapfroged? can you have leapfroged? can they have leapfroged?
Perfect en V-ing
can I have been leapfroging? can you have been leapfroging? can he have been leapfroging? can we have been leapfroging? can you have been leapfroging? can they have been leapfroging?
Forme interro-négative
Forme simple
can't I leapfrog? can't you leapfrog? can't he leapfrog? can't we leapfrog? can't you leapfrog? can't they leapfrog?
Forme en V-ing
can't I be leapfroging? can't you be leapfroging? can't he be leapfroging? can't we be leapfroging? can't you be leapfroging? can't they be leapfroging?
Perfect
can't I have leapfroged? can't you have leapfroged? can't he have leapfroged? can't we have leapfroged? can't you have leapfroged? can't they have leapfroged?
Perfect en V-ing
can't I have been leapfroging? can't you have been leapfroging? can't he have been leapfroging? can't we have been leapfroging? can't you have been leapfroging? can't they have been leapfroging?