may spiff
Regular verb: spiff - spiffed- spiffed

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

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

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

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