I can barnstorm you can barnstorm he can barnstorm we can barnstorm you can barnstorm they can barnstorm
V-ing form
I can be barnstorming you can be barnstorming he can be barnstorming we can be barnstorming you can be barnstorming they can be barnstorming
Perfect
I can have barnstormed you can have barnstormed he can have barnstormed we can have barnstormed you can have barnstormed they can have barnstormed
V-ing perfect
I can have been barnstorming you can have been barnstorming he can have been barnstorming we can have been barnstorming you can have been barnstorming they can have been barnstorming
Negation
Simple form
I cannot barnstorm you cannot barnstorm he cannot barnstorm we cannot barnstorm you cannot barnstorm they cannot barnstorm
V-ing form
I cannot be barnstorming you cannot be barnstorming he cannot be barnstorming we cannot be barnstorming you cannot be barnstorming they cannot be barnstorming
Perfect
I cannot have barnstormed you cannot have barnstormed he cannot have barnstormed we cannot have barnstormed you cannot have barnstormed they cannot have barnstormed
V-ing perfect
I cannot have been barnstorming you cannot have been barnstorming he cannot have been barnstorming we cannot have been barnstorming you cannot have been barnstorming they cannot have been barnstorming
Interrogative form
Simple form
can I barnstorm? can you barnstorm? can he barnstorm? can we barnstorm? can you barnstorm? can they barnstorm?
V-ing form
can I be barnstorming? can you be barnstorming? can he be barnstorming? can we be barnstorming? can you be barnstorming? can they be barnstorming?
Perfect
can I have barnstormed? can you have barnstormed? can he have barnstormed? can we have barnstormed? can you have barnstormed? can they have barnstormed?
V-ing perfect
can I have been barnstorming? can you have been barnstorming? can he have been barnstorming? can we have been barnstorming? can you have been barnstorming? can they have been barnstorming?
Interro-negative form
Simple form
can I not barnstorm? can you not barnstorm? can he not barnstorm? can we not barnstorm? can you not barnstorm? can they not barnstorm?
V-ing form
can I not be barnstorming? can you not be barnstorming? can he not be barnstorming? can we not be barnstorming? can you not be barnstorming? can they not be barnstorming?
Perfect
can I not have barnstormed? can you not have barnstormed? can he not have barnstormed? can we not have barnstormed? can you not have barnstormed? can they not have barnstormed?
V-ing perfect
can I not have been barnstorming? can you not have been barnstorming? can he not have been barnstorming? can we not have been barnstorming? can you not have been barnstorming? can they not have been barnstorming?