English verb conjugation
MAY FIRM

Regular verb: firm - firmed - firmed

Affirmation

Simple form	V-ing form
I may firm you may firm he may firm we may firm you may firm they may firm	I may be firming you may be firming he may be firming we may be firming you may be firming they may be firming
Perfect	V-ing perfect
I may have firmed you may have firmed he may have firmed we may have firmed you may have firmed they may have firmed	I may have been firming you may have been firming he may have been firming we may have been firming you may have been firming they may have been firming

Negation

Simple form	V-ing form
I mayn't firm you mayn't firm he mayn't firm we mayn't firm you mayn't firm they mayn't firm	I mayn't be firming you mayn't be firming he mayn't be firming we mayn't be firming you mayn't be firming they mayn't be firming
Perfect	V-ing perfect
I mayn't have firmed you mayn't have firmed he mayn't have firmed we mayn't have firmed you mayn't have firmed they mayn't have firmed	I mayn't have been firming you mayn't have been firming he mayn't have been firming we mayn't have been firming you mayn't have been firming they mayn't have been firming

Interrogative form

Simple form	V-ing form
may I firm? may you firm? may he firm? may we firm? may you firm? may they firm?	may I be firming? may you be firming? may he be firming? may we be firming? may you be firming? may they be firming?
Perfect	V-ing perfect
may I have firmed? may you have firmed? may he have firmed? may we have firmed? may you have firmed? may they have firmed?	may I have been firming? may you have been firming? may he have been firming? may we have been firming? may you have been firming? may they have been firming?

Interro-negative form

Simple form	V-ing form
mayn't I firm? mayn't you firm? mayn't he firm? mayn't we firm? mayn't you firm? mayn't they firm?	mayn't I be firming? mayn't you be firming? mayn't he be firming? mayn't we be firming? mayn't you be firming? mayn't they be firming?
Perfect	V-ing perfect
mayn't I have firmed? mayn't you have firmed? mayn't he have firmed? mayn't we have firmed? mayn't you have firmed? mayn't they have firmed?	mayn't I have been firming? mayn't you have been firming? mayn't he have been firming? mayn't we have been firming? mayn't you have been firming? mayn't they have been firming?