English verb conjugation
COULD CAPTION

Regular verb: caption - captioned - captioned

Affirmation

Simple form	V-ing form
I could caption you could caption he could caption we could caption you could caption they could caption	I could be captioning you could be captioning he could be captioning we could be captioning you could be captioning they could be captioning
Perfect	V-ing perfect
I could have captioned you could have captioned he 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 he 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
I could not caption you could not caption he could not caption we could not caption you could not caption they could not caption	I could not be captioning you could not be captioning he could not be captioning we could not be captioning you could not be captioning they could not be captioning
Perfect	V-ing perfect
I could not have captioned you could not have captioned he could not have captioned we could not have captioned you could not have captioned they could not have captioned	I could not have been captioning you could not have been captioning he could not have been captioning we could not have been captioning you could not have been captioning they could not have been captioning

Interrogative form

Simple form	V-ing form
could I caption? could you caption? could he caption? could we caption? could you caption? could they caption?	could I be captioning? could you be captioning? could he be captioning? could we be captioning? could you be captioning? could they be captioning?
Perfect	V-ing perfect
could I have captioned? could you have captioned? could he 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 he 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
could I not caption? could you not caption? could he not caption? could we not caption? could you not caption? could they not caption?	could I not be captioning? could you not be captioning? could he not be captioning? could we not be captioning? could you not be captioning? could they not be captioning?
Perfect	V-ing perfect
could I not have captioned? could you not have captioned? could he not have captioned? could we not have captioned? could you not have captioned? could they not have captioned?	could I not have been captioning? could you not have been captioning? could he not have been captioning? could we not have been captioning? could you not have been captioning? could they not have been captioning?