I can dream you can dream he can dream we can dream you can dream they can dream
V-ing form
I can be dreaming you can be dreaming he can be dreaming we can be dreaming you can be dreaming they can be dreaming
Perfect
I can have dreamed, dreamt you can have dreamed, dreamt he can have dreamed, dreamt we can have dreamed, dreamt you can have dreamed, dreamt they can have dreamed, dreamt
V-ing perfect
I can have been dreaming you can have been dreaming he can have been dreaming we can have been dreaming you can have been dreaming they can have been dreaming
Negation
Simple form
I cannot dream you cannot dream he cannot dream we cannot dream you cannot dream they cannot dream
V-ing form
I cannot be dreaming you cannot be dreaming he cannot be dreaming we cannot be dreaming you cannot be dreaming they cannot be dreaming
Perfect
I cannot have dreamed, dreamt you cannot have dreamed, dreamt he cannot have dreamed, dreamt we cannot have dreamed, dreamt you cannot have dreamed, dreamt they cannot have dreamed, dreamt
V-ing perfect
I cannot have been dreaming you cannot have been dreaming he cannot have been dreaming we cannot have been dreaming you cannot have been dreaming they cannot have been dreaming
Interrogative form
Simple form
can I dream? can you dream? can he dream? can we dream? can you dream? can they dream?
V-ing form
can I be dreaming? can you be dreaming? can he be dreaming? can we be dreaming? can you be dreaming? can they be dreaming?
Perfect
can I have dreamed, dreamt? can you have dreamed, dreamt? can he have dreamed, dreamt? can we have dreamed, dreamt? can you have dreamed, dreamt? can they have dreamed, dreamt?
V-ing perfect
can I have been dreaming? can you have been dreaming? can he have been dreaming? can we have been dreaming? can you have been dreaming? can they have been dreaming?
Interro-negative form
Simple form
can I not dream? can you not dream? can he not dream? can we not dream? can you not dream? can they not dream?
V-ing form
can I not be dreaming? can you not be dreaming? can he not be dreaming? can we not be dreaming? can you not be dreaming? can they not be dreaming?
Perfect
can I not have dreamed, dreamt? can you not have dreamed, dreamt? can he not have dreamed, dreamt? can we not have dreamed, dreamt? can you not have dreamed, dreamt? can they not have dreamed, dreamt?
V-ing perfect
can I not have been dreaming? can you not have been dreaming? can he not have been dreaming? can we not have been dreaming? can you not have been dreaming? can they not have been dreaming?