Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could deaden deaden you could deaden deaden he could deaden deaden we could deaden deaden you could deaden deaden they could deaden deaden
V-ing form
I could be deaden deadening you could be deaden deadening he could be deaden deadening we could be deaden deadening you could be deaden deadening they could be deaden deadening
Perfect
I could have deaden deadened you could have deaden deadened he could have deaden deadened we could have deaden deadened you could have deaden deadened they could have deaden deadened
V-ing perfect
I could have been deaden deadening you could have been deaden deadening he could have been deaden deadening we could have been deaden deadening you could have been deaden deadening they could have been deaden deadening
Negation
Simple form
I could not deaden deaden you could not deaden deaden he could not deaden deaden we could not deaden deaden you could not deaden deaden they could not deaden deaden
V-ing form
I could not be deaden deadening you could not be deaden deadening he could not be deaden deadening we could not be deaden deadening you could not be deaden deadening they could not be deaden deadening
Perfect
I could not have deaden deadened you could not have deaden deadened he could not have deaden deadened we could not have deaden deadened you could not have deaden deadened they could not have deaden deadened
V-ing perfect
I could not have been deaden deadening you could not have been deaden deadening he could not have been deaden deadening we could not have been deaden deadening you could not have been deaden deadening they could not have been deaden deadening
Interrogative form
Simple form
could I deaden deaden? could you deaden deaden? could he deaden deaden? could we deaden deaden? could you deaden deaden? could they deaden deaden?
V-ing form
could I be deaden deadening? could you be deaden deadening? could he be deaden deadening? could we be deaden deadening? could you be deaden deadening? could they be deaden deadening?
Perfect
could I have deaden deadened? could you have deaden deadened? could he have deaden deadened? could we have deaden deadened? could you have deaden deadened? could they have deaden deadened?
V-ing perfect
could I have been deaden deadening? could you have been deaden deadening? could he have been deaden deadening? could we have been deaden deadening? could you have been deaden deadening? could they have been deaden deadening?
Interro-negative form
Simple form
could I not deaden deaden? could you not deaden deaden? could he not deaden deaden? could we not deaden deaden? could you not deaden deaden? could they not deaden deaden?
V-ing form
could I not be deaden deadening? could you not be deaden deadening? could he not be deaden deadening? could we not be deaden deadening? could you not be deaden deadening? could they not be deaden deadening?
Perfect
could I not have deaden deadened? could you not have deaden deadened? could he not have deaden deadened? could we not have deaden deadened? could you not have deaden deadened? could they not have deaden deadened?
V-ing perfect
could I not have been deaden deadening? could you not have been deaden deadening? could he not have been deaden deadening? could we not have been deaden deadening? could you not have been deaden deadening? could they not have been deaden deadening?