I can free you can free he can free we can free you can free they can free
V-ing form
I can be freeing you can be freeing he can be freeing we can be freeing you can be freeing they can be freeing
Perfect
I can have freed you can have freed he can have freed we can have freed you can have freed they can have freed
V-ing perfect
I can have been freeing you can have been freeing he can have been freeing we can have been freeing you can have been freeing they can have been freeing
Negation
Simple form
I cannot free you cannot free he cannot free we cannot free you cannot free they cannot free
V-ing form
I cannot be freeing you cannot be freeing he cannot be freeing we cannot be freeing you cannot be freeing they cannot be freeing
Perfect
I cannot have freed you cannot have freed he cannot have freed we cannot have freed you cannot have freed they cannot have freed
V-ing perfect
I cannot have been freeing you cannot have been freeing he cannot have been freeing we cannot have been freeing you cannot have been freeing they cannot have been freeing
Interrogative form
Simple form
can I free? can you free? can he free? can we free? can you free? can they free?
V-ing form
can I be freeing? can you be freeing? can he be freeing? can we be freeing? can you be freeing? can they be freeing?
Perfect
can I have freed? can you have freed? can he have freed? can we have freed? can you have freed? can they have freed?
V-ing perfect
can I have been freeing? can you have been freeing? can he have been freeing? can we have been freeing? can you have been freeing? can they have been freeing?
Interro-negative form
Simple form
can I not free? can you not free? can he not free? can we not free? can you not free? can they not free?
V-ing form
can I not be freeing? can you not be freeing? can he not be freeing? can we not be freeing? can you not be freeing? can they not be freeing?
Perfect
can I not have freed? can you not have freed? can he not have freed? can we not have freed? can you not have freed? can they not have freed?
V-ing perfect
can I not have been freeing? can you not have been freeing? can he not have been freeing? can we not have been freeing? can you not have been freeing? can they not have been freeing?