could deafen
Regular verb: deafen - deafened- deafened

Affirmation 	
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I could deafen
you could deafen
he could deafen
we could deafen
you could deafen
they could deafen 	I could be deafening
you could be deafening
he could be deafening
we could be deafening
you could be deafening
they could be deafening	I could have deafened
you could have deafened
he could have deafened
we could have deafened
you could have deafened
they could have deafened	I could have been deafening
you could have been deafening
he could have been deafening
we could have been deafening
you could have been deafening
they could have been deafening	

Negation 	
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I couldn't deafen
you couldn't deafen
he couldn't deafen
we couldn't deafen
you couldn't deafen
they couldn't deafen 	I couldn't be deafening
you couldn't be deafening
he couldn't be deafening
we couldn't be deafening
you couldn't be deafening
they couldn't be deafening	I couldn't have deafened
you couldn't have deafened
he couldn't have deafened
we couldn't have deafened
you couldn't have deafened
they couldn't have deafened	I couldn't have been deafening
you couldn't have been deafening
he couldn't have been deafening
we couldn't have been deafening
you couldn't have been deafening
they couldn't have been deafening	

Interrogative form 	
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could I deafen?
could you deafen?
could he deafen?
could we deafen?
could you deafen?
could they deafen? 	could I be deafening?
could you be deafening?
could he be deafening?
could we be deafening?
could you be deafening?
could they be deafening? 	could I have deafened?
could you have deafened?
could he have deafened?
could we have deafened?
could you have deafened?
could they have deafened? 	could I have been deafening?
could you have been deafening?
could he have been deafening?
could we have been deafening?
could you have been deafening?
could they have been deafening? 	

Interro-negative form 	
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couldn't I deafen?
couldn't you deafen?
couldn't he deafen?
couldn't we deafen?
couldn't you deafen?
couldn't they deafen? 	couldn't I be deafening?
couldn't you be deafening?
couldn't he be deafening?
couldn't we be deafening?
couldn't you be deafening?
couldn't they be deafening? 	couldn't I have deafened?
couldn't you have deafened?
couldn't he have deafened?
couldn't we have deafened?
couldn't you have deafened?
couldn't they have deafened? 	couldn't I have been deafening?
couldn't you have been deafening?
couldn't he have been deafening?
couldn't we have been deafening?
couldn't you have been deafening?
couldn't they have been deafening?