I can perfect you can perfect he can perfect we can perfect you can perfect they can perfect
V-ing form
I can be perfecting you can be perfecting he can be perfecting we can be perfecting you can be perfecting they can be perfecting
Perfect
I can have perfected you can have perfected he can have perfected we can have perfected you can have perfected they can have perfected
V-ing perfect
I can have been perfecting you can have been perfecting he can have been perfecting we can have been perfecting you can have been perfecting they can have been perfecting
Negation
Simple form
I can't perfect you can't perfect he can't perfect we can't perfect you can't perfect they can't perfect
V-ing form
I can't be perfecting you can't be perfecting he can't be perfecting we can't be perfecting you can't be perfecting they can't be perfecting
Perfect
I can't have perfected you can't have perfected he can't have perfected we can't have perfected you can't have perfected they can't have perfected
V-ing perfect
I can't have been perfecting you can't have been perfecting he can't have been perfecting we can't have been perfecting you can't have been perfecting they can't have been perfecting
Interrogative form
Simple form
can I perfect? can you perfect? can he perfect? can we perfect? can you perfect? can they perfect?
V-ing form
can I be perfecting? can you be perfecting? can he be perfecting? can we be perfecting? can you be perfecting? can they be perfecting?
Perfect
can I have perfected? can you have perfected? can he have perfected? can we have perfected? can you have perfected? can they have perfected?
V-ing perfect
can I have been perfecting? can you have been perfecting? can he have been perfecting? can we have been perfecting? can you have been perfecting? can they have been perfecting?
Interro-negative form
Simple form
can't I perfect? can't you perfect? can't he perfect? can't we perfect? can't you perfect? can't they perfect?
V-ing form
can't I be perfecting? can't you be perfecting? can't he be perfecting? can't we be perfecting? can't you be perfecting? can't they be perfecting?
Perfect
can't I have perfected? can't you have perfected? can't he have perfected? can't we have perfected? can't you have perfected? can't they have perfected?
V-ing perfect
can't I have been perfecting? can't you have been perfecting? can't he have been perfecting? can't we have been perfecting? can't you have been perfecting? can't they have been perfecting?