English verb conjugation
COULD FOG

Regular verb: fog - fogged - fogged

Affirmation

Simple form	V-ing form
I could fog you could fog she could fog we could fog you could fog they could fog	I could be fogging you could be fogging she 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 she 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 she 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 could not fog you could not fog she could not fog we could not fog you could not fog they could not fog	I could not be fogging you could not be fogging she could not be fogging we could not be fogging you could not be fogging they could not be fogging
Perfect	V-ing perfect
I could not have fogged you could not have fogged she could not have fogged we could not have fogged you could not have fogged they could not have fogged	I could not have been fogging you could not have been fogging she could not have been fogging we could not have been fogging you could not have been fogging they could not have been fogging

Interrogative form

Simple form	V-ing form
could I fog? could you fog? could she fog? could we fog? could you fog? could they fog?	could I be fogging? could you be fogging? could she 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 she 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 she 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
could I not fog? could you not fog? could she not fog? could we not fog? could you not fog? could they not fog?	could I not be fogging? could you not be fogging? could she not be fogging? could we not be fogging? could you not be fogging? could they not be fogging?
Perfect	V-ing perfect
could I not have fogged? could you not have fogged? could she not have fogged? could we not have fogged? could you not have fogged? could they not have fogged?	could I not have been fogging? could you not have been fogging? could she not have been fogging? could we not have been fogging? could you not have been fogging? could they not have been fogging?