could quoin
Regular verb: quoin - quoined- quoined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could quoin
you could quoin
he could quoin
we could quoin
you could quoin
they could quoin 	I could be quoining
you could be quoining
he could be quoining
we could be quoining
you could be quoining
they could be quoining	I could have quoined
you could have quoined
he could have quoined
we could have quoined
you could have quoined
they could have quoined	I could have been quoining
you could have been quoining
he could have been quoining
we could have been quoining
you could have been quoining
they could have been quoining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't quoin
you couldn't quoin
he couldn't quoin
we couldn't quoin
you couldn't quoin
they couldn't quoin 	I couldn't be quoining
you couldn't be quoining
he couldn't be quoining
we couldn't be quoining
you couldn't be quoining
they couldn't be quoining	I couldn't have quoined
you couldn't have quoined
he couldn't have quoined
we couldn't have quoined
you couldn't have quoined
they couldn't have quoined	I couldn't have been quoining
you couldn't have been quoining
he couldn't have been quoining
we couldn't have been quoining
you couldn't have been quoining
they couldn't have been quoining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I quoin?
could you quoin?
could he quoin?
could we quoin?
could you quoin?
could they quoin? 	could I be quoining?
could you be quoining?
could he be quoining?
could we be quoining?
could you be quoining?
could they be quoining? 	could I have quoined?
could you have quoined?
could he have quoined?
could we have quoined?
could you have quoined?
could they have quoined? 	could I have been quoining?
could you have been quoining?
could he have been quoining?
could we have been quoining?
could you have been quoining?
could they have been quoining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I quoin?
couldn't you quoin?
couldn't he quoin?
couldn't we quoin?
couldn't you quoin?
couldn't they quoin? 	couldn't I be quoining?
couldn't you be quoining?
couldn't he be quoining?
couldn't we be quoining?
couldn't you be quoining?
couldn't they be quoining? 	couldn't I have quoined?
couldn't you have quoined?
couldn't he have quoined?
couldn't we have quoined?
couldn't you have quoined?
couldn't they have quoined? 	couldn't I have been quoining?
couldn't you have been quoining?
couldn't he have been quoining?
couldn't we have been quoining?
couldn't you have been quoining?
couldn't they have been quoining?