could nap
Regular verb: nap - napped- napped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nap
you could nap
she could nap
we could nap
you could nap
they could nap 	I could be napping
you could be napping
she could be napping
we could be napping
you could be napping
they could be napping	I could have napped
you could have napped
she could have napped
we could have napped
you could have napped
they could have napped	I could have been napping
you could have been napping
she could have been napping
we could have been napping
you could have been napping
they could have been napping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't nap
you couldn't nap
she couldn't nap
we couldn't nap
you couldn't nap
they couldn't nap 	I couldn't be napping
you couldn't be napping
she couldn't be napping
we couldn't be napping
you couldn't be napping
they couldn't be napping	I couldn't have napped
you couldn't have napped
she couldn't have napped
we couldn't have napped
you couldn't have napped
they couldn't have napped	I couldn't have been napping
you couldn't have been napping
she couldn't have been napping
we couldn't have been napping
you couldn't have been napping
they couldn't have been napping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nap?
could you nap?
could she nap?
could we nap?
could you nap?
could they nap? 	could I be napping?
could you be napping?
could she be napping?
could we be napping?
could you be napping?
could they be napping? 	could I have napped?
could you have napped?
could she have napped?
could we have napped?
could you have napped?
could they have napped? 	could I have been napping?
could you have been napping?
could she have been napping?
could we have been napping?
could you have been napping?
could they have been napping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I nap?
couldn't you nap?
couldn't she nap?
couldn't we nap?
couldn't you nap?
couldn't they nap? 	couldn't I be napping?
couldn't you be napping?
couldn't she be napping?
couldn't we be napping?
couldn't you be napping?
couldn't they be napping? 	couldn't I have napped?
couldn't you have napped?
couldn't she have napped?
couldn't we have napped?
couldn't you have napped?
couldn't they have napped? 	couldn't I have been napping?
couldn't you have been napping?
couldn't she have been napping?
couldn't we have been napping?
couldn't you have been napping?
couldn't they have been napping?