can preregister
Regular verb: preregister - preregistered- preregistered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can preregister
you can preregister
she can preregister
we can preregister
you can preregister
they can preregister 	I can be preregistering
you can be preregistering
she can be preregistering
we can be preregistering
you can be preregistering
they can be preregistering	I can have preregistered
you can have preregistered
she can have preregistered
we can have preregistered
you can have preregistered
they can have preregistered	I can have been preregistering
you can have been preregistering
she can have been preregistering
we can have been preregistering
you can have been preregistering
they can have been preregistering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't preregister
you can't preregister
she can't preregister
we can't preregister
you can't preregister
they can't preregister 	I can't be preregistering
you can't be preregistering
she can't be preregistering
we can't be preregistering
you can't be preregistering
they can't be preregistering	I can't have preregistered
you can't have preregistered
she can't have preregistered
we can't have preregistered
you can't have preregistered
they can't have preregistered	I can't have been preregistering
you can't have been preregistering
she can't have been preregistering
we can't have been preregistering
you can't have been preregistering
they can't have been preregistering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I preregister?
can you preregister?
can she preregister?
can we preregister?
can you preregister?
can they preregister? 	can I be preregistering?
can you be preregistering?
can she be preregistering?
can we be preregistering?
can you be preregistering?
can they be preregistering? 	can I have preregistered?
can you have preregistered?
can she have preregistered?
can we have preregistered?
can you have preregistered?
can they have preregistered? 	can I have been preregistering?
can you have been preregistering?
can she have been preregistering?
can we have been preregistering?
can you have been preregistering?
can they have been preregistering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I preregister?
can't you preregister?
can't she preregister?
can't we preregister?
can't you preregister?
can't they preregister? 	can't I be preregistering?
can't you be preregistering?
can't she be preregistering?
can't we be preregistering?
can't you be preregistering?
can't they be preregistering? 	can't I have preregistered?
can't you have preregistered?
can't she have preregistered?
can't we have preregistered?
can't you have preregistered?
can't they have preregistered? 	can't I have been preregistering?
can't you have been preregistering?
can't she have been preregistering?
can't we have been preregistering?
can't you have been preregistering?
can't they have been preregistering?