I can gag you can gag she can gag we can gag you can gag they can gag
V-ing form
I can be gagging you can be gagging she can be gagging we can be gagging you can be gagging they can be gagging
Perfect
I can have gagged you can have gagged she can have gagged we can have gagged you can have gagged they can have gagged
V-ing perfect
I can have been gagging you can have been gagging she can have been gagging we can have been gagging you can have been gagging they can have been gagging
Negation
Simple form
I cannot gag you cannot gag she cannot gag we cannot gag you cannot gag they cannot gag
V-ing form
I cannot be gagging you cannot be gagging she cannot be gagging we cannot be gagging you cannot be gagging they cannot be gagging
Perfect
I cannot have gagged you cannot have gagged she cannot have gagged we cannot have gagged you cannot have gagged they cannot have gagged
V-ing perfect
I cannot have been gagging you cannot have been gagging she cannot have been gagging we cannot have been gagging you cannot have been gagging they cannot have been gagging
Interrogative form
Simple form
can I gag? can you gag? can she gag? can we gag? can you gag? can they gag?
V-ing form
can I be gagging? can you be gagging? can she be gagging? can we be gagging? can you be gagging? can they be gagging?
Perfect
can I have gagged? can you have gagged? can she have gagged? can we have gagged? can you have gagged? can they have gagged?
V-ing perfect
can I have been gagging? can you have been gagging? can she have been gagging? can we have been gagging? can you have been gagging? can they have been gagging?
Interro-negative form
Simple form
can I not gag? can you not gag? can she not gag? can we not gag? can you not gag? can they not gag?
V-ing form
can I not be gagging? can you not be gagging? can she not be gagging? can we not be gagging? can you not be gagging? can they not be gagging?
Perfect
can I not have gagged? can you not have gagged? can she not have gagged? can we not have gagged? can you not have gagged? can they not have gagged?
V-ing perfect
can I not have been gagging? can you not have been gagging? can she not have been gagging? can we not have been gagging? can you not have been gagging? can they not have been gagging?