I could teletype you could teletype he could teletype we could teletype you could teletype they could teletype
V-ing form
I could be teletyping you could be teletyping he could be teletyping we could be teletyping you could be teletyping they could be teletyping
Perfect
I could have teletyped you could have teletyped he could have teletyped we could have teletyped you could have teletyped they could have teletyped
V-ing perfect
I could have been teletyping you could have been teletyping he could have been teletyping we could have been teletyping you could have been teletyping they could have been teletyping
Negation
Simple form
I could not teletype you could not teletype he could not teletype we could not teletype you could not teletype they could not teletype
V-ing form
I could not be teletyping you could not be teletyping he could not be teletyping we could not be teletyping you could not be teletyping they could not be teletyping
Perfect
I could not have teletyped you could not have teletyped he could not have teletyped we could not have teletyped you could not have teletyped they could not have teletyped
V-ing perfect
I could not have been teletyping you could not have been teletyping he could not have been teletyping we could not have been teletyping you could not have been teletyping they could not have been teletyping
Interrogative form
Simple form
could I teletype? could you teletype? could he teletype? could we teletype? could you teletype? could they teletype?
V-ing form
could I be teletyping? could you be teletyping? could he be teletyping? could we be teletyping? could you be teletyping? could they be teletyping?
Perfect
could I have teletyped? could you have teletyped? could he have teletyped? could we have teletyped? could you have teletyped? could they have teletyped?
V-ing perfect
could I have been teletyping? could you have been teletyping? could he have been teletyping? could we have been teletyping? could you have been teletyping? could they have been teletyping?
Interro-negative form
Simple form
could I not teletype? could you not teletype? could he not teletype? could we not teletype? could you not teletype? could they not teletype?
V-ing form
could I not be teletyping? could you not be teletyping? could he not be teletyping? could we not be teletyping? could you not be teletyping? could they not be teletyping?
Perfect
could I not have teletyped? could you not have teletyped? could he not have teletyped? could we not have teletyped? could you not have teletyped? could they not have teletyped?
V-ing perfect
could I not have been teletyping? could you not have been teletyping? could he not have been teletyping? could we not have been teletyping? could you not have been teletyping? could they not have been teletyping?