could superscribe
Regular verb: superscribe - superscribed- superscribed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could superscribe
you could superscribe
he could superscribe
we could superscribe
you could superscribe
they could superscribe 	I could be superscribing
you could be superscribing
he could be superscribing
we could be superscribing
you could be superscribing
they could be superscribing	I could have superscribed
you could have superscribed
he could have superscribed
we could have superscribed
you could have superscribed
they could have superscribed	I could have been superscribing
you could have been superscribing
he could have been superscribing
we could have been superscribing
you could have been superscribing
they could have been superscribing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't superscribe
you couldn't superscribe
he couldn't superscribe
we couldn't superscribe
you couldn't superscribe
they couldn't superscribe 	I couldn't be superscribing
you couldn't be superscribing
he couldn't be superscribing
we couldn't be superscribing
you couldn't be superscribing
they couldn't be superscribing	I couldn't have superscribed
you couldn't have superscribed
he couldn't have superscribed
we couldn't have superscribed
you couldn't have superscribed
they couldn't have superscribed	I couldn't have been superscribing
you couldn't have been superscribing
he couldn't have been superscribing
we couldn't have been superscribing
you couldn't have been superscribing
they couldn't have been superscribing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I superscribe?
could you superscribe?
could he superscribe?
could we superscribe?
could you superscribe?
could they superscribe? 	could I be superscribing?
could you be superscribing?
could he be superscribing?
could we be superscribing?
could you be superscribing?
could they be superscribing? 	could I have superscribed?
could you have superscribed?
could he have superscribed?
could we have superscribed?
could you have superscribed?
could they have superscribed? 	could I have been superscribing?
could you have been superscribing?
could he have been superscribing?
could we have been superscribing?
could you have been superscribing?
could they have been superscribing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I superscribe?
couldn't you superscribe?
couldn't he superscribe?
couldn't we superscribe?
couldn't you superscribe?
couldn't they superscribe? 	couldn't I be superscribing?
couldn't you be superscribing?
couldn't he be superscribing?
couldn't we be superscribing?
couldn't you be superscribing?
couldn't they be superscribing? 	couldn't I have superscribed?
couldn't you have superscribed?
couldn't he have superscribed?
couldn't we have superscribed?
couldn't you have superscribed?
couldn't they have superscribed? 	couldn't I have been superscribing?
couldn't you have been superscribing?
couldn't he have been superscribing?
couldn't we have been superscribing?
couldn't you have been superscribing?
couldn't they have been superscribing?