could quieten quieten
Regular verb: quieten quieten - quieten quietened- quieten quietened

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could quieten quieten
you could quieten quieten
he could quieten quieten
we could quieten quieten
you could quieten quieten
they could quieten quieten 	I could be quieten quietening
you could be quieten quietening
he could be quieten quietening
we could be quieten quietening
you could be quieten quietening
they could be quieten quietening	I could have quieten quietened
you could have quieten quietened
he could have quieten quietened
we could have quieten quietened
you could have quieten quietened
they could have quieten quietened	I could have been quieten quietening
you could have been quieten quietening
he could have been quieten quietening
we could have been quieten quietening
you could have been quieten quietening
they could have been quieten quietening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not quieten quieten
you could not quieten quieten
he could not quieten quieten
we could not quieten quieten
you could not quieten quieten
they could not quieten quieten 	I could not be quieten quietening
you could not be quieten quietening
he could not be quieten quietening
we could not be quieten quietening
you could not be quieten quietening
they could not be quieten quietening	I could not have quieten quietened
you could not have quieten quietened
he could not have quieten quietened
we could not have quieten quietened
you could not have quieten quietened
they could not have quieten quietened	I could not have been quieten quietening
you could not have been quieten quietening
he could not have been quieten quietening
we could not have been quieten quietening
you could not have been quieten quietening
they could not have been quieten quietening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I quieten quieten?
could you quieten quieten?
could he quieten quieten?
could we quieten quieten?
could you quieten quieten?
could they quieten quieten? 	could I be quieten quietening?
could you be quieten quietening?
could he be quieten quietening?
could we be quieten quietening?
could you be quieten quietening?
could they be quieten quietening? 	could I have quieten quietened?
could you have quieten quietened?
could he have quieten quietened?
could we have quieten quietened?
could you have quieten quietened?
could they have quieten quietened? 	could I have been quieten quietening?
could you have been quieten quietening?
could he have been quieten quietening?
could we have been quieten quietening?
could you have been quieten quietening?
could they have been quieten quietening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not quieten quieten?
could you not quieten quieten?
could he not quieten quieten?
could we not quieten quieten?
could you not quieten quieten?
could they not quieten quieten? 	could I not be quieten quietening?
could you not be quieten quietening?
could he not be quieten quietening?
could we not be quieten quietening?
could you not be quieten quietening?
could they not be quieten quietening? 	could I not have quieten quietened?
could you not have quieten quietened?
could he not have quieten quietened?
could we not have quieten quietened?
could you not have quieten quietened?
could they not have quieten quietened? 	could I not have been quieten quietening?
could you not have been quieten quietening?
could he not have been quieten quietening?
could we not have been quieten quietening?
could you not have been quieten quietening?
could they not have been quieten quietening?