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 couldn't quieten quieten
you couldn't quieten quieten
he couldn't quieten quieten
we couldn't quieten quieten
you couldn't quieten quieten
they couldn't quieten quieten 	I couldn't be quieten quietening
you couldn't be quieten quietening
he couldn't be quieten quietening
we couldn't be quieten quietening
you couldn't be quieten quietening
they couldn't be quieten quietening	I couldn't have quieten quietened
you couldn't have quieten quietened
he couldn't have quieten quietened
we couldn't have quieten quietened
you couldn't have quieten quietened
they couldn't have quieten quietened	I couldn't have been quieten quietening
you couldn't have been quieten quietening
he couldn't have been quieten quietening
we couldn't have been quieten quietening
you couldn't have been quieten quietening
they couldn't 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 	
couldn't I quieten quieten?
couldn't you quieten quieten?
couldn't he quieten quieten?
couldn't we quieten quieten?
couldn't you quieten quieten?
couldn't they quieten quieten? 	couldn't I be quieten quietening?
couldn't you be quieten quietening?
couldn't he be quieten quietening?
couldn't we be quieten quietening?
couldn't you be quieten quietening?
couldn't they be quieten quietening? 	couldn't I have quieten quietened?
couldn't you have quieten quietened?
couldn't he have quieten quietened?
couldn't we have quieten quietened?
couldn't you have quieten quietened?
couldn't they have quieten quietened? 	couldn't I have been quieten quietening?
couldn't you have been quieten quietening?
couldn't he have been quieten quietening?
couldn't we have been quieten quietening?
couldn't you have been quieten quietening?
couldn't they have been quieten quietening?