could caption
Regular verb: caption - captioned- captioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could caption
you could caption
she could caption
we could caption
you could caption
they could caption 	I could be captioning
you could be captioning
she could be captioning
we could be captioning
you could be captioning
they could be captioning	I could have captioned
you could have captioned
she could have captioned
we could have captioned
you could have captioned
they could have captioned	I could have been captioning
you could have been captioning
she could have been captioning
we could have been captioning
you could have been captioning
they could have been captioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't caption
you couldn't caption
she couldn't caption
we couldn't caption
you couldn't caption
they couldn't caption 	I couldn't be captioning
you couldn't be captioning
she couldn't be captioning
we couldn't be captioning
you couldn't be captioning
they couldn't be captioning	I couldn't have captioned
you couldn't have captioned
she couldn't have captioned
we couldn't have captioned
you couldn't have captioned
they couldn't have captioned	I couldn't have been captioning
you couldn't have been captioning
she couldn't have been captioning
we couldn't have been captioning
you couldn't have been captioning
they couldn't have been captioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I caption?
could you caption?
could she caption?
could we caption?
could you caption?
could they caption? 	could I be captioning?
could you be captioning?
could she be captioning?
could we be captioning?
could you be captioning?
could they be captioning? 	could I have captioned?
could you have captioned?
could she have captioned?
could we have captioned?
could you have captioned?
could they have captioned? 	could I have been captioning?
could you have been captioning?
could she have been captioning?
could we have been captioning?
could you have been captioning?
could they have been captioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I caption?
couldn't you caption?
couldn't she caption?
couldn't we caption?
couldn't you caption?
couldn't they caption? 	couldn't I be captioning?
couldn't you be captioning?
couldn't she be captioning?
couldn't we be captioning?
couldn't you be captioning?
couldn't they be captioning? 	couldn't I have captioned?
couldn't you have captioned?
couldn't she have captioned?
couldn't we have captioned?
couldn't you have captioned?
couldn't they have captioned? 	couldn't I have been captioning?
couldn't you have been captioning?
couldn't she have been captioning?
couldn't we have been captioning?
couldn't you have been captioning?
couldn't they have been captioning?