I could free you could free he could free we could free you could free they could free
V-ing form
I could be freeing you could be freeing he could be freeing we could be freeing you could be freeing they could be freeing
Perfect
I could have freed you could have freed he could have freed we could have freed you could have freed they could have freed
V-ing perfect
I could have been freeing you could have been freeing he could have been freeing we could have been freeing you could have been freeing they could have been freeing
Negation
Simple form
I couldn't free you couldn't free he couldn't free we couldn't free you couldn't free they couldn't free
V-ing form
I couldn't be freeing you couldn't be freeing he couldn't be freeing we couldn't be freeing you couldn't be freeing they couldn't be freeing
Perfect
I couldn't have freed you couldn't have freed he couldn't have freed we couldn't have freed you couldn't have freed they couldn't have freed
V-ing perfect
I couldn't have been freeing you couldn't have been freeing he couldn't have been freeing we couldn't have been freeing you couldn't have been freeing they couldn't have been freeing
Interrogative form
Simple form
could I free? could you free? could he free? could we free? could you free? could they free?
V-ing form
could I be freeing? could you be freeing? could he be freeing? could we be freeing? could you be freeing? could they be freeing?
Perfect
could I have freed? could you have freed? could he have freed? could we have freed? could you have freed? could they have freed?
V-ing perfect
could I have been freeing? could you have been freeing? could he have been freeing? could we have been freeing? could you have been freeing? could they have been freeing?
Interro-negative form
Simple form
couldn't I free? couldn't you free? couldn't he free? couldn't we free? couldn't you free? couldn't they free?
V-ing form
couldn't I be freeing? couldn't you be freeing? couldn't he be freeing? couldn't we be freeing? couldn't you be freeing? couldn't they be freeing?
Perfect
couldn't I have freed? couldn't you have freed? couldn't he have freed? couldn't we have freed? couldn't you have freed? couldn't they have freed?
V-ing perfect
couldn't I have been freeing? couldn't you have been freeing? couldn't he have been freeing? couldn't we have been freeing? couldn't you have been freeing? couldn't they have been freeing?