I can up you can up he can up we can up you can up they can up
V-ing form
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
I can have upped you can have upped he can have upped we can have upped you can have upped they can have upped
V-ing perfect
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
I can't up you can't up he can't up we can't up you can't up they can't up
V-ing form
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
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
V-ing perfect
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
can I up? can you up? can he up? can we up? can you up? can they up?
V-ing form
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
can I have upped? can you have upped? can he have upped? can we have upped? can you have upped? can they have upped?
V-ing perfect
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
can't I up? can't you up? can't he up? can't we up? can't you up? can't they up?
V-ing form
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
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?
V-ing perfect
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?