English verb conjugation
MAY SPIFF

Regular verb: spiff - spiffed - spiffed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?