English verb conjugation
MAY RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form	V-ing form
I may riff you may riff she may riff we may riff you may riff they may riff	I may be riffing you may be riffing she may be riffing we may be riffing you may be riffing they may be riffing
Perfect	V-ing perfect
I may have riffed you may have riffed she may have riffed we may have riffed you may have riffed they may have riffed	I may have been riffing you may have been riffing she may have been riffing we may have been riffing you may have been riffing they may have been riffing

Negation

Simple form	V-ing form
I mayn't riff you mayn't riff she mayn't riff we mayn't riff you mayn't riff they mayn't riff	I mayn't be riffing you mayn't be riffing she mayn't be riffing we mayn't be riffing you mayn't be riffing they mayn't be riffing
Perfect	V-ing perfect
I mayn't have riffed you mayn't have riffed she mayn't have riffed we mayn't have riffed you mayn't have riffed they mayn't have riffed	I mayn't have been riffing you mayn't have been riffing she mayn't have been riffing we mayn't have been riffing you mayn't have been riffing they mayn't have been riffing

Interrogative form

Simple form	V-ing form
may I riff? may you riff? may she riff? may we riff? may you riff? may they riff?	may I be riffing? may you be riffing? may she be riffing? may we be riffing? may you be riffing? may they be riffing?
Perfect	V-ing perfect
may I have riffed? may you have riffed? may she have riffed? may we have riffed? may you have riffed? may they have riffed?	may I have been riffing? may you have been riffing? may she have been riffing? may we have been riffing? may you have been riffing? may they have been riffing?

Interro-negative form

Simple form	V-ing form
mayn't I riff? mayn't you riff? mayn't she riff? mayn't we riff? mayn't you riff? mayn't they riff?	mayn't I be riffing? mayn't you be riffing? mayn't she be riffing? mayn't we be riffing? mayn't you be riffing? mayn't they be riffing?
Perfect	V-ing perfect
mayn't I have riffed? mayn't you have riffed? mayn't she have riffed? mayn't we have riffed? mayn't you have riffed? mayn't they have riffed?	mayn't I have been riffing? mayn't you have been riffing? mayn't she have been riffing? mayn't we have been riffing? mayn't you have been riffing? mayn't they have been riffing?