English verb conjugation
COULD WAG

Regular verb: wag - wagged - wagged

Affirmation

Simple form	V-ing form
I could wag you could wag he could wag we could wag you could wag they could wag	I could be wagging you could be wagging he could be wagging we could be wagging you could be wagging they could be wagging
Perfect	V-ing perfect
I could have wagged you could have wagged he could have wagged we could have wagged you could have wagged they could have wagged	I could have been wagging you could have been wagging he could have been wagging we could have been wagging you could have been wagging they could have been wagging

Negation

Simple form	V-ing form
I couldn't wag you couldn't wag he couldn't wag we couldn't wag you couldn't wag they couldn't wag	I couldn't be wagging you couldn't be wagging he couldn't be wagging we couldn't be wagging you couldn't be wagging they couldn't be wagging
Perfect	V-ing perfect
I couldn't have wagged you couldn't have wagged he couldn't have wagged we couldn't have wagged you couldn't have wagged they couldn't have wagged	I couldn't have been wagging you couldn't have been wagging he couldn't have been wagging we couldn't have been wagging you couldn't have been wagging they couldn't have been wagging

Interrogative form

Simple form	V-ing form
could I wag? could you wag? could he wag? could we wag? could you wag? could they wag?	could I be wagging? could you be wagging? could he be wagging? could we be wagging? could you be wagging? could they be wagging?
Perfect	V-ing perfect
could I have wagged? could you have wagged? could he have wagged? could we have wagged? could you have wagged? could they have wagged?	could I have been wagging? could you have been wagging? could he have been wagging? could we have been wagging? could you have been wagging? could they have been wagging?

Interro-negative form

Simple form	V-ing form
couldn't I wag? couldn't you wag? couldn't he wag? couldn't we wag? couldn't you wag? couldn't they wag?	couldn't I be wagging? couldn't you be wagging? couldn't he be wagging? couldn't we be wagging? couldn't you be wagging? couldn't they be wagging?
Perfect	V-ing perfect
couldn't I have wagged? couldn't you have wagged? couldn't he have wagged? couldn't we have wagged? couldn't you have wagged? couldn't they have wagged?	couldn't I have been wagging? couldn't you have been wagging? couldn't he have been wagging? couldn't we have been wagging? couldn't you have been wagging? couldn't they have been wagging?