I could retype you could retype he could retype we could retype you could retype they could retype
V-ing form
I could be retyping you could be retyping he could be retyping we could be retyping you could be retyping they could be retyping
Perfect
I could have retyped you could have retyped he could have retyped we could have retyped you could have retyped they could have retyped
V-ing perfect
I could have been retyping you could have been retyping he could have been retyping we could have been retyping you could have been retyping they could have been retyping
Negation
Simple form
I couldn't retype you couldn't retype he couldn't retype we couldn't retype you couldn't retype they couldn't retype
V-ing form
I couldn't be retyping you couldn't be retyping he couldn't be retyping we couldn't be retyping you couldn't be retyping they couldn't be retyping
Perfect
I couldn't have retyped you couldn't have retyped he couldn't have retyped we couldn't have retyped you couldn't have retyped they couldn't have retyped
V-ing perfect
I couldn't have been retyping you couldn't have been retyping he couldn't have been retyping we couldn't have been retyping you couldn't have been retyping they couldn't have been retyping
Interrogative form
Simple form
could I retype? could you retype? could he retype? could we retype? could you retype? could they retype?
V-ing form
could I be retyping? could you be retyping? could he be retyping? could we be retyping? could you be retyping? could they be retyping?
Perfect
could I have retyped? could you have retyped? could he have retyped? could we have retyped? could you have retyped? could they have retyped?
V-ing perfect
could I have been retyping? could you have been retyping? could he have been retyping? could we have been retyping? could you have been retyping? could they have been retyping?
Interro-negative form
Simple form
couldn't I retype? couldn't you retype? couldn't he retype? couldn't we retype? couldn't you retype? couldn't they retype?
V-ing form
couldn't I be retyping? couldn't you be retyping? couldn't he be retyping? couldn't we be retyping? couldn't you be retyping? couldn't they be retyping?
Perfect
couldn't I have retyped? couldn't you have retyped? couldn't he have retyped? couldn't we have retyped? couldn't you have retyped? couldn't they have retyped?
V-ing perfect
couldn't I have been retyping? couldn't you have been retyping? couldn't he have been retyping? couldn't we have been retyping? couldn't you have been retyping? couldn't they have been retyping?