English verb conjugation
CAN UP

Regular verb: up - upped - upped

Affirmation

Simple form	V-ing form
I can up you can up he can up we can up you can up they can up	I can be upping you can be upping he can be upping we can be upping you can be upping they can be upping
Perfect	V-ing perfect
I can have upped you can have upped he can have upped we can have upped you can have upped they can have upped	I can have been upping you can have been upping he can have been upping we can have been upping you can have been upping they can have been upping

Negation

Simple form	V-ing form
I can't up you can't up he can't up we can't up you can't up they can't up	I can't be upping you can't be upping he can't be upping we can't be upping you can't be upping they can't be upping
Perfect	V-ing perfect
I can't have upped you can't have upped he can't have upped we can't have upped you can't have upped they can't have upped	I can't have been upping you can't have been upping he can't have been upping we can't have been upping you can't have been upping they can't have been upping

Interrogative form

Simple form	V-ing form
can I up? can you up? can he up? can we up? can you up? can they up?	can I be upping? can you be upping? can he be upping? can we be upping? can you be upping? can they be upping?
Perfect	V-ing perfect
can I have upped? can you have upped? can he have upped? can we have upped? can you have upped? can they have upped?	can I have been upping? can you have been upping? can he have been upping? can we have been upping? can you have been upping? can they have been upping?

Interro-negative form

Simple form	V-ing form
can't I up? can't you up? can't he up? can't we up? can't you up? can't they up?	can't I be upping? can't you be upping? can't he be upping? can't we be upping? can't you be upping? can't they be upping?
Perfect	V-ing perfect
can't I have upped? can't you have upped? can't he have upped? can't we have upped? can't you have upped? can't they have upped?	can't I have been upping? can't you have been upping? can't he have been upping? can't we have been upping? can't you have been upping? can't they have been upping?