could chap
Regular verb: chap - chapped- chapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could chap
you could chap
she could chap
we could chap
you could chap
they could chap 	I could be chapping
you could be chapping
she could be chapping
we could be chapping
you could be chapping
they could be chapping	I could have chapped
you could have chapped
she could have chapped
we could have chapped
you could have chapped
they could have chapped	I could have been chapping
you could have been chapping
she could have been chapping
we could have been chapping
you could have been chapping
they could have been chapping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't chap
you couldn't chap
she couldn't chap
we couldn't chap
you couldn't chap
they couldn't chap 	I couldn't be chapping
you couldn't be chapping
she couldn't be chapping
we couldn't be chapping
you couldn't be chapping
they couldn't be chapping	I couldn't have chapped
you couldn't have chapped
she couldn't have chapped
we couldn't have chapped
you couldn't have chapped
they couldn't have chapped	I couldn't have been chapping
you couldn't have been chapping
she couldn't have been chapping
we couldn't have been chapping
you couldn't have been chapping
they couldn't have been chapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I chap?
could you chap?
could she chap?
could we chap?
could you chap?
could they chap? 	could I be chapping?
could you be chapping?
could she be chapping?
could we be chapping?
could you be chapping?
could they be chapping? 	could I have chapped?
could you have chapped?
could she have chapped?
could we have chapped?
could you have chapped?
could they have chapped? 	could I have been chapping?
could you have been chapping?
could she have been chapping?
could we have been chapping?
could you have been chapping?
could they have been chapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I chap?
couldn't you chap?
couldn't she chap?
couldn't we chap?
couldn't you chap?
couldn't they chap? 	couldn't I be chapping?
couldn't you be chapping?
couldn't she be chapping?
couldn't we be chapping?
couldn't you be chapping?
couldn't they be chapping? 	couldn't I have chapped?
couldn't you have chapped?
couldn't she have chapped?
couldn't we have chapped?
couldn't you have chapped?
couldn't they have chapped? 	couldn't I have been chapping?
couldn't you have been chapping?
couldn't she have been chapping?
couldn't we have been chapping?
couldn't you have been chapping?
couldn't they have been chapping?