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 cannot spiff
you cannot spiff
he cannot spiff
we cannot spiff
you cannot spiff
they cannot spiff 	I cannot be spiffing
you cannot be spiffing
he cannot be spiffing
we cannot be spiffing
you cannot be spiffing
they cannot be spiffing	I cannot have spiffed
you cannot have spiffed
he cannot have spiffed
we cannot have spiffed
you cannot have spiffed
they cannot have spiffed	I cannot have been spiffing
you cannot have been spiffing
he cannot have been spiffing
we cannot have been spiffing
you cannot have been spiffing
they cannot 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 I not spiff?
can you not spiff?
can he not spiff?
can we not spiff?
can you not spiff?
can they not spiff? 	can I not be spiffing?
can you not be spiffing?
can he not be spiffing?
can we not be spiffing?
can you not be spiffing?
can they not be spiffing? 	can I not have spiffed?
can you not have spiffed?
can he not have spiffed?
can we not have spiffed?
can you not have spiffed?
can they not have spiffed? 	can I not have been spiffing?
can you not have been spiffing?
can he not have been spiffing?
can we not have been spiffing?
can you not have been spiffing?
can they not have been spiffing?