English verb conjugation
MAY FESTER

Regular verb: fester - festered - festered

Affirmation

Simple form	V-ing form
I may fester you may fester he may fester we may fester you may fester they may fester	I may be festering you may be festering he may be festering we may be festering you may be festering they may be festering
Perfect	V-ing perfect
I may have festered you may have festered he may have festered we may have festered you may have festered they may have festered	I may have been festering you may have been festering he may have been festering we may have been festering you may have been festering they may have been festering

Negation

Simple form	V-ing form
I mayn't fester you mayn't fester he mayn't fester we mayn't fester you mayn't fester they mayn't fester	I mayn't be festering you mayn't be festering he mayn't be festering we mayn't be festering you mayn't be festering they mayn't be festering
Perfect	V-ing perfect
I mayn't have festered you mayn't have festered he mayn't have festered we mayn't have festered you mayn't have festered they mayn't have festered	I mayn't have been festering you mayn't have been festering he mayn't have been festering we mayn't have been festering you mayn't have been festering they mayn't have been festering

Interrogative form

Simple form	V-ing form
may I fester? may you fester? may he fester? may we fester? may you fester? may they fester?	may I be festering? may you be festering? may he be festering? may we be festering? may you be festering? may they be festering?
Perfect	V-ing perfect
may I have festered? may you have festered? may he have festered? may we have festered? may you have festered? may they have festered?	may I have been festering? may you have been festering? may he have been festering? may we have been festering? may you have been festering? may they have been festering?

Interro-negative form

Simple form	V-ing form
mayn't I fester? mayn't you fester? mayn't he fester? mayn't we fester? mayn't you fester? mayn't they fester?	mayn't I be festering? mayn't you be festering? mayn't he be festering? mayn't we be festering? mayn't you be festering? mayn't they be festering?
Perfect	V-ing perfect
mayn't I have festered? mayn't you have festered? mayn't he have festered? mayn't we have festered? mayn't you have festered? mayn't they have festered?	mayn't I have been festering? mayn't you have been festering? mayn't he have been festering? mayn't we have been festering? mayn't you have been festering? mayn't they have been festering?