English verb conjugation
COULD FLAW

Regular verb: flaw - flawed - flawed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?