I could adapt you could adapt she could adapt we could adapt you could adapt they could adapt
V-ing form
I could be adapting you could be adapting she could be adapting we could be adapting you could be adapting they could be adapting
Perfect
I could have adapted you could have adapted she could have adapted we could have adapted you could have adapted they could have adapted
V-ing perfect
I could have been adapting you could have been adapting she could have been adapting we could have been adapting you could have been adapting they could have been adapting
Negation
Simple form
I could not adapt you could not adapt she could not adapt we could not adapt you could not adapt they could not adapt
V-ing form
I could not be adapting you could not be adapting she could not be adapting we could not be adapting you could not be adapting they could not be adapting
Perfect
I could not have adapted you could not have adapted she could not have adapted we could not have adapted you could not have adapted they could not have adapted
V-ing perfect
I could not have been adapting you could not have been adapting she could not have been adapting we could not have been adapting you could not have been adapting they could not have been adapting
Interrogative form
Simple form
could I adapt? could you adapt? could she adapt? could we adapt? could you adapt? could they adapt?
V-ing form
could I be adapting? could you be adapting? could she be adapting? could we be adapting? could you be adapting? could they be adapting?
Perfect
could I have adapted? could you have adapted? could she have adapted? could we have adapted? could you have adapted? could they have adapted?
V-ing perfect
could I have been adapting? could you have been adapting? could she have been adapting? could we have been adapting? could you have been adapting? could they have been adapting?
Interro-negative form
Simple form
could I not adapt? could you not adapt? could she not adapt? could we not adapt? could you not adapt? could they not adapt?
V-ing form
could I not be adapting? could you not be adapting? could she not be adapting? could we not be adapting? could you not be adapting? could they not be adapting?
Perfect
could I not have adapted? could you not have adapted? could she not have adapted? could we not have adapted? could you not have adapted? could they not have adapted?
V-ing perfect
could I not have been adapting? could you not have been adapting? could she not have been adapting? could we not have been adapting? could you not have been adapting? could they not have been adapting?