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 may not spiff you may not spiff he may not spiff we may not spiff you may not spiff they may not spiff	I may not be spiffing you may not be spiffing he may not be spiffing we may not be spiffing you may not be spiffing they may not be spiffing
Perfect	V-ing perfect
I may not have spiffed you may not have spiffed he may not have spiffed we may not have spiffed you may not have spiffed they may not have spiffed	I may not have been spiffing you may not have been spiffing he may not have been spiffing we may not have been spiffing you may not have been spiffing they may not 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
may I not spiff? may you not spiff? may he not spiff? may we not spiff? may you not spiff? may they not spiff?	may I not be spiffing? may you not be spiffing? may he not be spiffing? may we not be spiffing? may you not be spiffing? may they not be spiffing?
Perfect	V-ing perfect
may I not have spiffed? may you not have spiffed? may he not have spiffed? may we not have spiffed? may you not have spiffed? may they not have spiffed?	may I not have been spiffing? may you not have been spiffing? may he not have been spiffing? may we not have been spiffing? may you not have been spiffing? may they not have been spiffing?