could deaden
Regular verb: deaden - deadened- deadened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could deaden
you could deaden
she could deaden
we could deaden
you could deaden
they could deaden 	I could be deadening
you could be deadening
she could be deadening
we could be deadening
you could be deadening
they could be deadening	I could have deadened
you could have deadened
she could have deadened
we could have deadened
you could have deadened
they could have deadened	I could have been deadening
you could have been deadening
she could have been deadening
we could have been deadening
you could have been deadening
they could have been deadening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not deaden
you could not deaden
she could not deaden
we could not deaden
you could not deaden
they could not deaden 	I could not be deadening
you could not be deadening
she could not be deadening
we could not be deadening
you could not be deadening
they could not be deadening	I could not have deadened
you could not have deadened
she could not have deadened
we could not have deadened
you could not have deadened
they could not have deadened	I could not have been deadening
you could not have been deadening
she could not have been deadening
we could not have been deadening
you could not have been deadening
they could not have been deadening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I deaden?
could you deaden?
could she deaden?
could we deaden?
could you deaden?
could they deaden? 	could I be deadening?
could you be deadening?
could she be deadening?
could we be deadening?
could you be deadening?
could they be deadening? 	could I have deadened?
could you have deadened?
could she have deadened?
could we have deadened?
could you have deadened?
could they have deadened? 	could I have been deadening?
could you have been deadening?
could she have been deadening?
could we have been deadening?
could you have been deadening?
could they have been deadening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not deaden?
could you not deaden?
could she not deaden?
could we not deaden?
could you not deaden?
could they not deaden? 	could I not be deadening?
could you not be deadening?
could she not be deadening?
could we not be deadening?
could you not be deadening?
could they not be deadening? 	could I not have deadened?
could you not have deadened?
could she not have deadened?
could we not have deadened?
could you not have deadened?
could they not have deadened? 	could I not have been deadening?
could you not have been deadening?
could she not have been deadening?
could we not have been deadening?
could you not have been deadening?
could they not have been deadening?