I could drape you could drape he could drape we could drape you could drape they could drape
V-ing form
I could be draping you could be draping he could be draping we could be draping you could be draping they could be draping
Perfect
I could have draped you could have draped he could have draped we could have draped you could have draped they could have draped
V-ing perfect
I could have been draping you could have been draping he could have been draping we could have been draping you could have been draping they could have been draping
Negation
Simple form
I could not drape you could not drape he could not drape we could not drape you could not drape they could not drape
V-ing form
I could not be draping you could not be draping he could not be draping we could not be draping you could not be draping they could not be draping
Perfect
I could not have draped you could not have draped he could not have draped we could not have draped you could not have draped they could not have draped
V-ing perfect
I could not have been draping you could not have been draping he could not have been draping we could not have been draping you could not have been draping they could not have been draping
Interrogative form
Simple form
could I drape? could you drape? could he drape? could we drape? could you drape? could they drape?
V-ing form
could I be draping? could you be draping? could he be draping? could we be draping? could you be draping? could they be draping?
Perfect
could I have draped? could you have draped? could he have draped? could we have draped? could you have draped? could they have draped?
V-ing perfect
could I have been draping? could you have been draping? could he have been draping? could we have been draping? could you have been draping? could they have been draping?
Interro-negative form
Simple form
could I not drape? could you not drape? could he not drape? could we not drape? could you not drape? could they not drape?
V-ing form
could I not be draping? could you not be draping? could he not be draping? could we not be draping? could you not be draping? could they not be draping?
Perfect
could I not have draped? could you not have draped? could he not have draped? could we not have draped? could you not have draped? could they not have draped?
V-ing perfect
could I not have been draping? could you not have been draping? could he not have been draping? could we not have been draping? could you not have been draping? could they not have been draping?