I can save you can save he can save we can save you can save they can save
V-ing form
I can be saving you can be saving he can be saving we can be saving you can be saving they can be saving
Perfect
I can have saved you can have saved he can have saved we can have saved you can have saved they can have saved
V-ing perfect
I can have been saving you can have been saving he can have been saving we can have been saving you can have been saving they can have been saving
Negation
Simple form
I cannot save you cannot save he cannot save we cannot save you cannot save they cannot save
V-ing form
I cannot be saving you cannot be saving he cannot be saving we cannot be saving you cannot be saving they cannot be saving
Perfect
I cannot have saved you cannot have saved he cannot have saved we cannot have saved you cannot have saved they cannot have saved
V-ing perfect
I cannot have been saving you cannot have been saving he cannot have been saving we cannot have been saving you cannot have been saving they cannot have been saving
Interrogative form
Simple form
can I save? can you save? can he save? can we save? can you save? can they save?
V-ing form
can I be saving? can you be saving? can he be saving? can we be saving? can you be saving? can they be saving?
Perfect
can I have saved? can you have saved? can he have saved? can we have saved? can you have saved? can they have saved?
V-ing perfect
can I have been saving? can you have been saving? can he have been saving? can we have been saving? can you have been saving? can they have been saving?
Interro-negative form
Simple form
can I not save? can you not save? can he not save? can we not save? can you not save? can they not save?
V-ing form
can I not be saving? can you not be saving? can he not be saving? can we not be saving? can you not be saving? can they not be saving?
Perfect
can I not have saved? can you not have saved? can he not have saved? can we not have saved? can you not have saved? can they not have saved?
V-ing perfect
can I not have been saving? can you not have been saving? can he not have been saving? can we not have been saving? can you not have been saving? can they not have been saving?