English verb conjugation
COULD SWAP

Regular verb: swap - swaped - swaped

Affirmation

Simple form	V-ing form
I could swap you could swap he could swap we could swap you could swap they could swap	I could be swaping you could be swaping he could be swaping we could be swaping you could be swaping they could be swaping
Perfect	V-ing perfect
I could have swaped you could have swaped he could have swaped we could have swaped you could have swaped they could have swaped	I could have been swaping you could have been swaping he could have been swaping we could have been swaping you could have been swaping they could have been swaping

Negation

Simple form	V-ing form
I couldn't swap you couldn't swap he couldn't swap we couldn't swap you couldn't swap they couldn't swap	I couldn't be swaping you couldn't be swaping he couldn't be swaping we couldn't be swaping you couldn't be swaping they couldn't be swaping
Perfect	V-ing perfect
I couldn't have swaped you couldn't have swaped he couldn't have swaped we couldn't have swaped you couldn't have swaped they couldn't have swaped	I couldn't have been swaping you couldn't have been swaping he couldn't have been swaping we couldn't have been swaping you couldn't have been swaping they couldn't have been swaping

Interrogative form

Simple form	V-ing form
could I swap? could you swap? could he swap? could we swap? could you swap? could they swap?	could I be swaping? could you be swaping? could he be swaping? could we be swaping? could you be swaping? could they be swaping?
Perfect	V-ing perfect
could I have swaped? could you have swaped? could he have swaped? could we have swaped? could you have swaped? could they have swaped?	could I have been swaping? could you have been swaping? could he have been swaping? could we have been swaping? could you have been swaping? could they have been swaping?

Interro-negative form

Simple form	V-ing form
couldn't I swap? couldn't you swap? couldn't he swap? couldn't we swap? couldn't you swap? couldn't they swap?	couldn't I be swaping? couldn't you be swaping? couldn't he be swaping? couldn't we be swaping? couldn't you be swaping? couldn't they be swaping?
Perfect	V-ing perfect
couldn't I have swaped? couldn't you have swaped? couldn't he have swaped? couldn't we have swaped? couldn't you have swaped? couldn't they have swaped?	couldn't I have been swaping? couldn't you have been swaping? couldn't he have been swaping? couldn't we have been swaping? couldn't you have been swaping? couldn't they have been swaping?