I can glasspaper you can glasspaper he can glasspaper we can glasspaper you can glasspaper they can glasspaper
V-ing form
I can be glasspapering you can be glasspapering he can be glasspapering we can be glasspapering you can be glasspapering they can be glasspapering
Perfect
I can have glasspapered you can have glasspapered he can have glasspapered we can have glasspapered you can have glasspapered they can have glasspapered
V-ing perfect
I can have been glasspapering you can have been glasspapering he can have been glasspapering we can have been glasspapering you can have been glasspapering they can have been glasspapering
Negation
Simple form
I cannot glasspaper you cannot glasspaper he cannot glasspaper we cannot glasspaper you cannot glasspaper they cannot glasspaper
V-ing form
I cannot be glasspapering you cannot be glasspapering he cannot be glasspapering we cannot be glasspapering you cannot be glasspapering they cannot be glasspapering
Perfect
I cannot have glasspapered you cannot have glasspapered he cannot have glasspapered we cannot have glasspapered you cannot have glasspapered they cannot have glasspapered
V-ing perfect
I cannot have been glasspapering you cannot have been glasspapering he cannot have been glasspapering we cannot have been glasspapering you cannot have been glasspapering they cannot have been glasspapering
Interrogative form
Simple form
can I glasspaper? can you glasspaper? can he glasspaper? can we glasspaper? can you glasspaper? can they glasspaper?
V-ing form
can I be glasspapering? can you be glasspapering? can he be glasspapering? can we be glasspapering? can you be glasspapering? can they be glasspapering?
Perfect
can I have glasspapered? can you have glasspapered? can he have glasspapered? can we have glasspapered? can you have glasspapered? can they have glasspapered?
V-ing perfect
can I have been glasspapering? can you have been glasspapering? can he have been glasspapering? can we have been glasspapering? can you have been glasspapering? can they have been glasspapering?
Interro-negative form
Simple form
can I not glasspaper? can you not glasspaper? can he not glasspaper? can we not glasspaper? can you not glasspaper? can they not glasspaper?
V-ing form
can I not be glasspapering? can you not be glasspapering? can he not be glasspapering? can we not be glasspapering? can you not be glasspapering? can they not be glasspapering?
Perfect
can I not have glasspapered? can you not have glasspapered? can he not have glasspapered? can we not have glasspapered? can you not have glasspapered? can they not have glasspapered?
V-ing perfect
can I not have been glasspapering? can you not have been glasspapering? can he not have been glasspapering? can we not have been glasspapering? can you not have been glasspapering? can they not have been glasspapering?