I can adapt you can adapt he can adapt we can adapt you can adapt they can adapt
V-ing form
I can be adapting you can be adapting he can be adapting we can be adapting you can be adapting they can be adapting
Perfect
I can have adapted you can have adapted he can have adapted we can have adapted you can have adapted they can have adapted
V-ing perfect
I can have been adapting you can have been adapting he can have been adapting we can have been adapting you can have been adapting they can have been adapting
Negation
Simple form
I can't adapt you can't adapt he can't adapt we can't adapt you can't adapt they can't adapt
V-ing form
I can't be adapting you can't be adapting he can't be adapting we can't be adapting you can't be adapting they can't be adapting
Perfect
I can't have adapted you can't have adapted he can't have adapted we can't have adapted you can't have adapted they can't have adapted
V-ing perfect
I can't have been adapting you can't have been adapting he can't have been adapting we can't have been adapting you can't have been adapting they can't have been adapting
Interrogative form
Simple form
can I adapt? can you adapt? can he adapt? can we adapt? can you adapt? can they adapt?
V-ing form
can I be adapting? can you be adapting? can he be adapting? can we be adapting? can you be adapting? can they be adapting?
Perfect
can I have adapted? can you have adapted? can he have adapted? can we have adapted? can you have adapted? can they have adapted?
V-ing perfect
can I have been adapting? can you have been adapting? can he have been adapting? can we have been adapting? can you have been adapting? can they have been adapting?
Interro-negative form
Simple form
can't I adapt? can't you adapt? can't he adapt? can't we adapt? can't you adapt? can't they adapt?
V-ing form
can't I be adapting? can't you be adapting? can't he be adapting? can't we be adapting? can't you be adapting? can't they be adapting?
Perfect
can't I have adapted? can't you have adapted? can't he have adapted? can't we have adapted? can't you have adapted? can't they have adapted?
V-ing perfect
can't I have been adapting? can't you have been adapting? can't he have been adapting? can't we have been adapting? can't you have been adapting? can't they have been adapting?