English verb conjugation
COULD PERFECT

Regular verb: perfect - perfected - perfected

Affirmation

Simple form	V-ing form
I could perfect you could perfect he could perfect we could perfect you could perfect they could perfect	I could be perfecting you could be perfecting he could be perfecting we could be perfecting you could be perfecting they could be perfecting
Perfect	V-ing perfect
I could have perfected you could have perfected he could have perfected we could have perfected you could have perfected they could have perfected	I could have been perfecting you could have been perfecting he could have been perfecting we could have been perfecting you could have been perfecting they could have been perfecting

Negation

Simple form	V-ing form
I could not perfect you could not perfect he could not perfect we could not perfect you could not perfect they could not perfect	I could not be perfecting you could not be perfecting he could not be perfecting we could not be perfecting you could not be perfecting they could not be perfecting
Perfect	V-ing perfect
I could not have perfected you could not have perfected he could not have perfected we could not have perfected you could not have perfected they could not have perfected	I could not have been perfecting you could not have been perfecting he could not have been perfecting we could not have been perfecting you could not have been perfecting they could not have been perfecting

Interrogative form

Simple form	V-ing form
could I perfect? could you perfect? could he perfect? could we perfect? could you perfect? could they perfect?	could I be perfecting? could you be perfecting? could he be perfecting? could we be perfecting? could you be perfecting? could they be perfecting?
Perfect	V-ing perfect
could I have perfected? could you have perfected? could he have perfected? could we have perfected? could you have perfected? could they have perfected?	could I have been perfecting? could you have been perfecting? could he have been perfecting? could we have been perfecting? could you have been perfecting? could they have been perfecting?

Interro-negative form

Simple form	V-ing form
could I not perfect? could you not perfect? could he not perfect? could we not perfect? could you not perfect? could they not perfect?	could I not be perfecting? could you not be perfecting? could he not be perfecting? could we not be perfecting? could you not be perfecting? could they not be perfecting?
Perfect	V-ing perfect
could I not have perfected? could you not have perfected? could he not have perfected? could we not have perfected? could you not have perfected? could they not have perfected?	could I not have been perfecting? could you not have been perfecting? could he not have been perfecting? could we not have been perfecting? could you not have been perfecting? could they not have been perfecting?