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