English verb conjugation
COULD CAP

Regular verb: cap - capped - capped

Affirmation

Simple form	V-ing form
I could cap you could cap he could cap we could cap you could cap they could cap	I could be capping you could be capping he could be capping we could be capping you could be capping they could be capping
Perfect	V-ing perfect
I could have capped you could have capped he could have capped we could have capped you could have capped they could have capped	I could have been capping you could have been capping he could have been capping we could have been capping you could have been capping they could have been capping

Negation

Simple form	V-ing form
I couldn't cap you couldn't cap he couldn't cap we couldn't cap you couldn't cap they couldn't cap	I couldn't be capping you couldn't be capping he couldn't be capping we couldn't be capping you couldn't be capping they couldn't be capping
Perfect	V-ing perfect
I couldn't have capped you couldn't have capped he couldn't have capped we couldn't have capped you couldn't have capped they couldn't have capped	I couldn't have been capping you couldn't have been capping he couldn't have been capping we couldn't have been capping you couldn't have been capping they couldn't have been capping

Interrogative form

Simple form	V-ing form
could I cap? could you cap? could he cap? could we cap? could you cap? could they cap?	could I be capping? could you be capping? could he be capping? could we be capping? could you be capping? could they be capping?
Perfect	V-ing perfect
could I have capped? could you have capped? could he have capped? could we have capped? could you have capped? could they have capped?	could I have been capping? could you have been capping? could he have been capping? could we have been capping? could you have been capping? could they have been capping?

Interro-negative form

Simple form	V-ing form
couldn't I cap? couldn't you cap? couldn't he cap? couldn't we cap? couldn't you cap? couldn't they cap?	couldn't I be capping? couldn't you be capping? couldn't he be capping? couldn't we be capping? couldn't you be capping? couldn't they be capping?
Perfect	V-ing perfect
couldn't I have capped? couldn't you have capped? couldn't he have capped? couldn't we have capped? couldn't you have capped? couldn't they have capped?	couldn't I have been capping? couldn't you have been capping? couldn't he have been capping? couldn't we have been capping? couldn't you have been capping? couldn't they have been capping?