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 can't free you can't free she can't free we can't free you can't free they can't free
V-ing form
I can't be freeing you can't be freeing she can't be freeing we can't be freeing you can't be freeing they can't be freeing
Perfect
I can't have freed you can't have freed she can't have freed we can't have freed you can't have freed they can't have freed
V-ing perfect
I can't have been freeing you can't have been freeing she can't have been freeing we can't have been freeing you can't have been freeing they can't 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't I free? can't you free? can't she free? can't we free? can't you free? can't they free?
V-ing form
can't I be freeing? can't you be freeing? can't she be freeing? can't we be freeing? can't you be freeing? can't they be freeing?
Perfect
can't I have freed? can't you have freed? can't she have freed? can't we have freed? can't you have freed? can't they have freed?
V-ing perfect
can't I have been freeing? can't you have been freeing? can't she have been freeing? can't we have been freeing? can't you have been freeing? can't they have been freeing?