can spiff
Regular verb: spiff - spiffed- spiffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can spiff
you can spiff
he can spiff
we can spiff
you can spiff
they can spiff 	I can be spiffing
you can be spiffing
he can be spiffing
we can be spiffing
you can be spiffing
they can be spiffing	I can have spiffed
you can have spiffed
he can have spiffed
we can have spiffed
you can have spiffed
they can have spiffed	I can have been spiffing
you can have been spiffing
he can have been spiffing
we can have been spiffing
you can have been spiffing
they can have been spiffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't spiff
you can't spiff
he can't spiff
we can't spiff
you can't spiff
they can't spiff 	I can't be spiffing
you can't be spiffing
he can't be spiffing
we can't be spiffing
you can't be spiffing
they can't be spiffing	I can't have spiffed
you can't have spiffed
he can't have spiffed
we can't have spiffed
you can't have spiffed
they can't have spiffed	I can't have been spiffing
you can't have been spiffing
he can't have been spiffing
we can't have been spiffing
you can't have been spiffing
they can't have been spiffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I spiff?
can you spiff?
can he spiff?
can we spiff?
can you spiff?
can they spiff? 	can I be spiffing?
can you be spiffing?
can he be spiffing?
can we be spiffing?
can you be spiffing?
can they be spiffing? 	can I have spiffed?
can you have spiffed?
can he have spiffed?
can we have spiffed?
can you have spiffed?
can they have spiffed? 	can I have been spiffing?
can you have been spiffing?
can he have been spiffing?
can we have been spiffing?
can you have been spiffing?
can they have been spiffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I spiff?
can't you spiff?
can't he spiff?
can't we spiff?
can't you spiff?
can't they spiff? 	can't I be spiffing?
can't you be spiffing?
can't he be spiffing?
can't we be spiffing?
can't you be spiffing?
can't they be spiffing? 	can't I have spiffed?
can't you have spiffed?
can't he have spiffed?
can't we have spiffed?
can't you have spiffed?
can't they have spiffed? 	can't I have been spiffing?
can't you have been spiffing?
can't he have been spiffing?
can't we have been spiffing?
can't you have been spiffing?
can't they have been spiffing?