English verb conjugation
MAY SPIFF

Regular verb: spiff - spiffed - spiffed

Affirmation

Simple form	V-ing form
I may spiff you may spiff she may spiff we may spiff you may spiff they may spiff	I may be spiffing you may be spiffing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she spiff? may we spiff? may you spiff? may they spiff?	may I be spiffing? may you be spiffing? may she 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 she 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 she 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 she 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 she 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 she 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 she have been spiffing? mayn't we have been spiffing? mayn't you have been spiffing? mayn't they have been spiffing?