I can doze you can doze he can doze we can doze you can doze they can doze
V-ing form
I can be dozing you can be dozing he can be dozing we can be dozing you can be dozing they can be dozing
Perfect
I can have dozed you can have dozed he can have dozed we can have dozed you can have dozed they can have dozed
V-ing perfect
I can have been dozing you can have been dozing he can have been dozing we can have been dozing you can have been dozing they can have been dozing
Negation
Simple form
I can't doze you can't doze he can't doze we can't doze you can't doze they can't doze
V-ing form
I can't be dozing you can't be dozing he can't be dozing we can't be dozing you can't be dozing they can't be dozing
Perfect
I can't have dozed you can't have dozed he can't have dozed we can't have dozed you can't have dozed they can't have dozed
V-ing perfect
I can't have been dozing you can't have been dozing he can't have been dozing we can't have been dozing you can't have been dozing they can't have been dozing
Interrogative form
Simple form
can I doze? can you doze? can he doze? can we doze? can you doze? can they doze?
V-ing form
can I be dozing? can you be dozing? can he be dozing? can we be dozing? can you be dozing? can they be dozing?
Perfect
can I have dozed? can you have dozed? can he have dozed? can we have dozed? can you have dozed? can they have dozed?
V-ing perfect
can I have been dozing? can you have been dozing? can he have been dozing? can we have been dozing? can you have been dozing? can they have been dozing?
Interro-negative form
Simple form
can't I doze? can't you doze? can't he doze? can't we doze? can't you doze? can't they doze?
V-ing form
can't I be dozing? can't you be dozing? can't he be dozing? can't we be dozing? can't you be dozing? can't they be dozing?
Perfect
can't I have dozed? can't you have dozed? can't he have dozed? can't we have dozed? can't you have dozed? can't they have dozed?
V-ing perfect
can't I have been dozing? can't you have been dozing? can't he have been dozing? can't we have been dozing? can't you have been dozing? can't they have been dozing?