I can free you can free she can free we can free you can free they can free
V-ing form
I can be freeing you can be freeing she can be freeing we can be freeing you can be freeing they can be freeing
Perfect
I can have freed you can have freed she 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 she 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 she cannot free we cannot free you cannot free they cannot free
V-ing form
I cannot be freeing you cannot be freeing she cannot be freeing we cannot be freeing you cannot be freeing they cannot be freeing
Perfect
I cannot have freed you cannot have freed she 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 she 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 she free? can we free? can you free? can they free?
V-ing form
can I be freeing? can you be freeing? can she be freeing? can we be freeing? can you be freeing? can they be freeing?
Perfect
can I have freed? can you have freed? can she 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 she 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 she 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 she 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 she 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 she not have been freeing? can we not have been freeing? can you not have been freeing? can they not have been freeing?