can regain
Regular verb: regain - regained- regained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can regain
you can regain
she can regain
we can regain
you can regain
they can regain 	I can be regaining
you can be regaining
she can be regaining
we can be regaining
you can be regaining
they can be regaining	I can have regained
you can have regained
she can have regained
we can have regained
you can have regained
they can have regained	I can have been regaining
you can have been regaining
she can have been regaining
we can have been regaining
you can have been regaining
they can have been regaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't regain
you can't regain
she can't regain
we can't regain
you can't regain
they can't regain 	I can't be regaining
you can't be regaining
she can't be regaining
we can't be regaining
you can't be regaining
they can't be regaining	I can't have regained
you can't have regained
she can't have regained
we can't have regained
you can't have regained
they can't have regained	I can't have been regaining
you can't have been regaining
she can't have been regaining
we can't have been regaining
you can't have been regaining
they can't have been regaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I regain?
can you regain?
can she regain?
can we regain?
can you regain?
can they regain? 	can I be regaining?
can you be regaining?
can she be regaining?
can we be regaining?
can you be regaining?
can they be regaining? 	can I have regained?
can you have regained?
can she have regained?
can we have regained?
can you have regained?
can they have regained? 	can I have been regaining?
can you have been regaining?
can she have been regaining?
can we have been regaining?
can you have been regaining?
can they have been regaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I regain?
can't you regain?
can't she regain?
can't we regain?
can't you regain?
can't they regain? 	can't I be regaining?
can't you be regaining?
can't she be regaining?
can't we be regaining?
can't you be regaining?
can't they be regaining? 	can't I have regained?
can't you have regained?
can't she have regained?
can't we have regained?
can't you have regained?
can't they have regained? 	can't I have been regaining?
can't you have been regaining?
can't she have been regaining?
can't we have been regaining?
can't you have been regaining?
can't they have been regaining?