could flaw
Regular verb: flaw - flawed- flawed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could flaw
you could flaw
he could flaw
we could flaw
you could flaw
they could flaw 	I could be flawing
you could be flawing
he could be flawing
we could be flawing
you could be flawing
they could be flawing	I could have flawed
you could have flawed
he could have flawed
we could have flawed
you could have flawed
they could have flawed	I could have been flawing
you could have been flawing
he could have been flawing
we could have been flawing
you could have been flawing
they could have been flawing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't flaw
you couldn't flaw
he couldn't flaw
we couldn't flaw
you couldn't flaw
they couldn't flaw 	I couldn't be flawing
you couldn't be flawing
he couldn't be flawing
we couldn't be flawing
you couldn't be flawing
they couldn't be flawing	I couldn't have flawed
you couldn't have flawed
he couldn't have flawed
we couldn't have flawed
you couldn't have flawed
they couldn't have flawed	I couldn't have been flawing
you couldn't have been flawing
he couldn't have been flawing
we couldn't have been flawing
you couldn't have been flawing
they couldn't have been flawing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I flaw?
could you flaw?
could he flaw?
could we flaw?
could you flaw?
could they flaw? 	could I be flawing?
could you be flawing?
could he be flawing?
could we be flawing?
could you be flawing?
could they be flawing? 	could I have flawed?
could you have flawed?
could he have flawed?
could we have flawed?
could you have flawed?
could they have flawed? 	could I have been flawing?
could you have been flawing?
could he have been flawing?
could we have been flawing?
could you have been flawing?
could they have been flawing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I flaw?
couldn't you flaw?
couldn't he flaw?
couldn't we flaw?
couldn't you flaw?
couldn't they flaw? 	couldn't I be flawing?
couldn't you be flawing?
couldn't he be flawing?
couldn't we be flawing?
couldn't you be flawing?
couldn't they be flawing? 	couldn't I have flawed?
couldn't you have flawed?
couldn't he have flawed?
couldn't we have flawed?
couldn't you have flawed?
couldn't they have flawed? 	couldn't I have been flawing?
couldn't you have been flawing?
couldn't he have been flawing?
couldn't we have been flawing?
couldn't you have been flawing?
couldn't they have been flawing?