I can catapult you can catapult he can catapult we can catapult you can catapult they can catapult
V-ing form
I can be catapulting you can be catapulting he can be catapulting we can be catapulting you can be catapulting they can be catapulting
Perfect
I can have catapulted you can have catapulted he can have catapulted we can have catapulted you can have catapulted they can have catapulted
V-ing perfect
I can have been catapulting you can have been catapulting he can have been catapulting we can have been catapulting you can have been catapulting they can have been catapulting
Negation
Simple form
I cannot catapult you cannot catapult he cannot catapult we cannot catapult you cannot catapult they cannot catapult
V-ing form
I cannot be catapulting you cannot be catapulting he cannot be catapulting we cannot be catapulting you cannot be catapulting they cannot be catapulting
Perfect
I cannot have catapulted you cannot have catapulted he cannot have catapulted we cannot have catapulted you cannot have catapulted they cannot have catapulted
V-ing perfect
I cannot have been catapulting you cannot have been catapulting he cannot have been catapulting we cannot have been catapulting you cannot have been catapulting they cannot have been catapulting
Interrogative form
Simple form
can I catapult? can you catapult? can he catapult? can we catapult? can you catapult? can they catapult?
V-ing form
can I be catapulting? can you be catapulting? can he be catapulting? can we be catapulting? can you be catapulting? can they be catapulting?
Perfect
can I have catapulted? can you have catapulted? can he have catapulted? can we have catapulted? can you have catapulted? can they have catapulted?
V-ing perfect
can I have been catapulting? can you have been catapulting? can he have been catapulting? can we have been catapulting? can you have been catapulting? can they have been catapulting?
Interro-negative form
Simple form
can I not catapult? can you not catapult? can he not catapult? can we not catapult? can you not catapult? can they not catapult?
V-ing form
can I not be catapulting? can you not be catapulting? can he not be catapulting? can we not be catapulting? can you not be catapulting? can they not be catapulting?
Perfect
can I not have catapulted? can you not have catapulted? can he not have catapulted? can we not have catapulted? can you not have catapulted? can they not have catapulted?
V-ing perfect
can I not have been catapulting? can you not have been catapulting? can he not have been catapulting? can we not have been catapulting? can you not have been catapulting? can they not have been catapulting?