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 couldn't dream you couldn't dream he couldn't dream we couldn't dream you couldn't dream they couldn't dream
V-ing form
I couldn't be dreaming you couldn't be dreaming he couldn't be dreaming we couldn't be dreaming you couldn't be dreaming they couldn't be dreaming
Perfect
I couldn't have dreamed, dreamt you couldn't have dreamed, dreamt he couldn't have dreamed, dreamt we couldn't have dreamed, dreamt you couldn't have dreamed, dreamt they couldn't have dreamed, dreamt
V-ing perfect
I couldn't have been dreaming you couldn't have been dreaming he couldn't have been dreaming we couldn't have been dreaming you couldn't have been dreaming they couldn't 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
couldn't I dream? couldn't you dream? couldn't he dream? couldn't we dream? couldn't you dream? couldn't they dream?
V-ing form
couldn't I be dreaming? couldn't you be dreaming? couldn't he be dreaming? couldn't we be dreaming? couldn't you be dreaming? couldn't they be dreaming?
Perfect
couldn't I have dreamed, dreamt? couldn't you have dreamed, dreamt? couldn't he have dreamed, dreamt? couldn't we have dreamed, dreamt? couldn't you have dreamed, dreamt? couldn't they have dreamed, dreamt?
V-ing perfect
couldn't I have been dreaming? couldn't you have been dreaming? couldn't he have been dreaming? couldn't we have been dreaming? couldn't you have been dreaming? couldn't they have been dreaming?