English verb conjugation
COULD FOG

Regular verb: fog - fogged - fogged

Affirmation

Simple form	V-ing form
I could fog you could fog he could fog we could fog you could fog they could fog	I could be fogging you could be fogging he could be fogging we could be fogging you could be fogging they could be fogging
Perfect	V-ing perfect
I could have fogged you could have fogged he could have fogged we could have fogged you could have fogged they could have fogged	I could have been fogging you could have been fogging he could have been fogging we could have been fogging you could have been fogging they could have been fogging

Negation

Simple form	V-ing form
I couldn't fog you couldn't fog he couldn't fog we couldn't fog you couldn't fog they couldn't fog	I couldn't be fogging you couldn't be fogging he couldn't be fogging we couldn't be fogging you couldn't be fogging they couldn't be fogging
Perfect	V-ing perfect
I couldn't have fogged you couldn't have fogged he couldn't have fogged we couldn't have fogged you couldn't have fogged they couldn't have fogged	I couldn't have been fogging you couldn't have been fogging he couldn't have been fogging we couldn't have been fogging you couldn't have been fogging they couldn't have been fogging

Interrogative form

Simple form	V-ing form
could I fog? could you fog? could he fog? could we fog? could you fog? could they fog?	could I be fogging? could you be fogging? could he be fogging? could we be fogging? could you be fogging? could they be fogging?
Perfect	V-ing perfect
could I have fogged? could you have fogged? could he have fogged? could we have fogged? could you have fogged? could they have fogged?	could I have been fogging? could you have been fogging? could he have been fogging? could we have been fogging? could you have been fogging? could they have been fogging?

Interro-negative form

Simple form	V-ing form
couldn't I fog? couldn't you fog? couldn't he fog? couldn't we fog? couldn't you fog? couldn't they fog?	couldn't I be fogging? couldn't you be fogging? couldn't he be fogging? couldn't we be fogging? couldn't you be fogging? couldn't they be fogging?
Perfect	V-ing perfect
couldn't I have fogged? couldn't you have fogged? couldn't he have fogged? couldn't we have fogged? couldn't you have fogged? couldn't they have fogged?	couldn't I have been fogging? couldn't you have been fogging? couldn't he have been fogging? couldn't we have been fogging? couldn't you have been fogging? couldn't they have been fogging?