English verb conjugation
COULD GAG

Regular verb: gag - gagged - gagged

Affirmation

Simple form	V-ing form
I could gag you could gag she could gag we could gag you could gag they could gag	I could be gagging you could be gagging she could be gagging we could be gagging you could be gagging they could be gagging
Perfect	V-ing perfect
I could have gagged you could have gagged she could have gagged we could have gagged you could have gagged they could have gagged	I could have been gagging you could have been gagging she could have been gagging we could have been gagging you could have been gagging they could have been gagging

Negation

Simple form	V-ing form
I couldn't gag you couldn't gag she couldn't gag we couldn't gag you couldn't gag they couldn't gag	I couldn't be gagging you couldn't be gagging she couldn't be gagging we couldn't be gagging you couldn't be gagging they couldn't be gagging
Perfect	V-ing perfect
I couldn't have gagged you couldn't have gagged she couldn't have gagged we couldn't have gagged you couldn't have gagged they couldn't have gagged	I couldn't have been gagging you couldn't have been gagging she couldn't have been gagging we couldn't have been gagging you couldn't have been gagging they couldn't have been gagging

Interrogative form

Simple form	V-ing form
could I gag? could you gag? could she gag? could we gag? could you gag? could they gag?	could I be gagging? could you be gagging? could she be gagging? could we be gagging? could you be gagging? could they be gagging?
Perfect	V-ing perfect
could I have gagged? could you have gagged? could she have gagged? could we have gagged? could you have gagged? could they have gagged?	could I have been gagging? could you have been gagging? could she have been gagging? could we have been gagging? could you have been gagging? could they have been gagging?

Interro-negative form

Simple form	V-ing form
couldn't I gag? couldn't you gag? couldn't she gag? couldn't we gag? couldn't you gag? couldn't they gag?	couldn't I be gagging? couldn't you be gagging? couldn't she be gagging? couldn't we be gagging? couldn't you be gagging? couldn't they be gagging?
Perfect	V-ing perfect
couldn't I have gagged? couldn't you have gagged? couldn't she have gagged? couldn't we have gagged? couldn't you have gagged? couldn't they have gagged?	couldn't I have been gagging? couldn't you have been gagging? couldn't she have been gagging? couldn't we have been gagging? couldn't you have been gagging? couldn't they have been gagging?