can gag
Regular verb: gag - gagged- gagged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can gag
you can gag
he can gag
we can gag
you can gag
they can gag 	I can be gagging
you can be gagging
he can be gagging
we can be gagging
you can be gagging
they can be gagging	I can have gagged
you can have gagged
he can have gagged
we can have gagged
you can have gagged
they can have gagged	I can have been gagging
you can have been gagging
he can have been gagging
we can have been gagging
you can have been gagging
they can have been gagging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't gag
you can't gag
he can't gag
we can't gag
you can't gag
they can't gag 	I can't be gagging
you can't be gagging
he can't be gagging
we can't be gagging
you can't be gagging
they can't be gagging	I can't have gagged
you can't have gagged
he can't have gagged
we can't have gagged
you can't have gagged
they can't have gagged	I can't have been gagging
you can't have been gagging
he can't have been gagging
we can't have been gagging
you can't have been gagging
they can't have been gagging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I gag?
can you gag?
can he gag?
can we gag?
can you gag?
can they gag? 	can I be gagging?
can you be gagging?
can he be gagging?
can we be gagging?
can you be gagging?
can they be gagging? 	can I have gagged?
can you have gagged?
can he have gagged?
can we have gagged?
can you have gagged?
can they have gagged? 	can I have been gagging?
can you have been gagging?
can he have been gagging?
can we have been gagging?
can you have been gagging?
can they have been gagging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I gag?
can't you gag?
can't he gag?
can't we gag?
can't you gag?
can't they gag? 	can't I be gagging?
can't you be gagging?
can't he be gagging?
can't we be gagging?
can't you be gagging?
can't they be gagging? 	can't I have gagged?
can't you have gagged?
can't he have gagged?
can't we have gagged?
can't you have gagged?
can't they have gagged? 	can't I have been gagging?
can't you have been gagging?
can't he have been gagging?
can't we have been gagging?
can't you have been gagging?
can't they have been gagging?