could reregister
Regular verb: reregister - reregistered- reregistered

Affirmation 	
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I could reregister
you could reregister
he could reregister
we could reregister
you could reregister
they could reregister 	I could be reregistering
you could be reregistering
he could be reregistering
we could be reregistering
you could be reregistering
they could be reregistering	I could have reregistered
you could have reregistered
he could have reregistered
we could have reregistered
you could have reregistered
they could have reregistered	I could have been reregistering
you could have been reregistering
he could have been reregistering
we could have been reregistering
you could have been reregistering
they could have been reregistering	

Negation 	
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I couldn't reregister
you couldn't reregister
he couldn't reregister
we couldn't reregister
you couldn't reregister
they couldn't reregister 	I couldn't be reregistering
you couldn't be reregistering
he couldn't be reregistering
we couldn't be reregistering
you couldn't be reregistering
they couldn't be reregistering	I couldn't have reregistered
you couldn't have reregistered
he couldn't have reregistered
we couldn't have reregistered
you couldn't have reregistered
they couldn't have reregistered	I couldn't have been reregistering
you couldn't have been reregistering
he couldn't have been reregistering
we couldn't have been reregistering
you couldn't have been reregistering
they couldn't have been reregistering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I reregister?
could you reregister?
could he reregister?
could we reregister?
could you reregister?
could they reregister? 	could I be reregistering?
could you be reregistering?
could he be reregistering?
could we be reregistering?
could you be reregistering?
could they be reregistering? 	could I have reregistered?
could you have reregistered?
could he have reregistered?
could we have reregistered?
could you have reregistered?
could they have reregistered? 	could I have been reregistering?
could you have been reregistering?
could he have been reregistering?
could we have been reregistering?
could you have been reregistering?
could they have been reregistering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I reregister?
couldn't you reregister?
couldn't he reregister?
couldn't we reregister?
couldn't you reregister?
couldn't they reregister? 	couldn't I be reregistering?
couldn't you be reregistering?
couldn't he be reregistering?
couldn't we be reregistering?
couldn't you be reregistering?
couldn't they be reregistering? 	couldn't I have reregistered?
couldn't you have reregistered?
couldn't he have reregistered?
couldn't we have reregistered?
couldn't you have reregistered?
couldn't they have reregistered? 	couldn't I have been reregistering?
couldn't you have been reregistering?
couldn't he have been reregistering?
couldn't we have been reregistering?
couldn't you have been reregistering?
couldn't they have been reregistering?