English verb conjugation
MAY RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form	V-ing form
I may riff you may riff he may riff we may riff you may riff they may riff	I may be riffing you may be riffing he 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 he 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 he 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 he 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 he 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 he 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 he 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 he riff? may we riff? may you riff? may they riff?	may I be riffing? may you be riffing? may he 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 he 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 he 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 he 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 he 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 he 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 he have been riffing? mayn't we have been riffing? mayn't you have been riffing? mayn't they have been riffing?