can pup
Regular verb: pup - pupped- pupped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can pup
you can pup
he can pup
we can pup
you can pup
they can pup 	I can be pupping
you can be pupping
he can be pupping
we can be pupping
you can be pupping
they can be pupping	I can have pupped
you can have pupped
he can have pupped
we can have pupped
you can have pupped
they can have pupped	I can have been pupping
you can have been pupping
he can have been pupping
we can have been pupping
you can have been pupping
they can have been pupping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't pup
you can't pup
he can't pup
we can't pup
you can't pup
they can't pup 	I can't be pupping
you can't be pupping
he can't be pupping
we can't be pupping
you can't be pupping
they can't be pupping	I can't have pupped
you can't have pupped
he can't have pupped
we can't have pupped
you can't have pupped
they can't have pupped	I can't have been pupping
you can't have been pupping
he can't have been pupping
we can't have been pupping
you can't have been pupping
they can't have been pupping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I pup?
can you pup?
can he pup?
can we pup?
can you pup?
can they pup? 	can I be pupping?
can you be pupping?
can he be pupping?
can we be pupping?
can you be pupping?
can they be pupping? 	can I have pupped?
can you have pupped?
can he have pupped?
can we have pupped?
can you have pupped?
can they have pupped? 	can I have been pupping?
can you have been pupping?
can he have been pupping?
can we have been pupping?
can you have been pupping?
can they have been pupping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I pup?
can't you pup?
can't he pup?
can't we pup?
can't you pup?
can't they pup? 	can't I be pupping?
can't you be pupping?
can't he be pupping?
can't we be pupping?
can't you be pupping?
can't they be pupping? 	can't I have pupped?
can't you have pupped?
can't he have pupped?
can't we have pupped?
can't you have pupped?
can't they have pupped? 	can't I have been pupping?
can't you have been pupping?
can't he have been pupping?
can't we have been pupping?
can't you have been pupping?
can't they have been pupping?