English verb conjugation
COULD DOG

Regular verb: dog - dogged - dogged

Affirmation

Simple form	V-ing form
I could dog you could dog he could dog we could dog you could dog they could dog	I could be dogging you could be dogging he could be dogging we could be dogging you could be dogging they could be dogging
Perfect	V-ing perfect
I could have dogged you could have dogged he could have dogged we could have dogged you could have dogged they could have dogged	I could have been dogging you could have been dogging he could have been dogging we could have been dogging you could have been dogging they could have been dogging

Negation

Simple form	V-ing form
I couldn't dog you couldn't dog he couldn't dog we couldn't dog you couldn't dog they couldn't dog	I couldn't be dogging you couldn't be dogging he couldn't be dogging we couldn't be dogging you couldn't be dogging they couldn't be dogging
Perfect	V-ing perfect
I couldn't have dogged you couldn't have dogged he couldn't have dogged we couldn't have dogged you couldn't have dogged they couldn't have dogged	I couldn't have been dogging you couldn't have been dogging he couldn't have been dogging we couldn't have been dogging you couldn't have been dogging they couldn't have been dogging

Interrogative form

Simple form	V-ing form
could I dog? could you dog? could he dog? could we dog? could you dog? could they dog?	could I be dogging? could you be dogging? could he be dogging? could we be dogging? could you be dogging? could they be dogging?
Perfect	V-ing perfect
could I have dogged? could you have dogged? could he have dogged? could we have dogged? could you have dogged? could they have dogged?	could I have been dogging? could you have been dogging? could he have been dogging? could we have been dogging? could you have been dogging? could they have been dogging?

Interro-negative form

Simple form	V-ing form
couldn't I dog? couldn't you dog? couldn't he dog? couldn't we dog? couldn't you dog? couldn't they dog?	couldn't I be dogging? couldn't you be dogging? couldn't he be dogging? couldn't we be dogging? couldn't you be dogging? couldn't they be dogging?
Perfect	V-ing perfect
couldn't I have dogged? couldn't you have dogged? couldn't he have dogged? couldn't we have dogged? couldn't you have dogged? couldn't they have dogged?	couldn't I have been dogging? couldn't you have been dogging? couldn't he have been dogging? couldn't we have been dogging? couldn't you have been dogging? couldn't they have been dogging?