English verb conjugation
MAY BIFF

Regular verb: biff - biffed - biffed

Affirmation

Simple form	V-ing form
I may biff you may biff he may biff we may biff you may biff they may biff	I may be biffing you may be biffing he may be biffing we may be biffing you may be biffing they may be biffing
Perfect	V-ing perfect
I may have biffed you may have biffed he may have biffed we may have biffed you may have biffed they may have biffed	I may have been biffing you may have been biffing he may have been biffing we may have been biffing you may have been biffing they may have been biffing

Negation

Simple form	V-ing form
I mayn't biff you mayn't biff he mayn't biff we mayn't biff you mayn't biff they mayn't biff	I mayn't be biffing you mayn't be biffing he mayn't be biffing we mayn't be biffing you mayn't be biffing they mayn't be biffing
Perfect	V-ing perfect
I mayn't have biffed you mayn't have biffed he mayn't have biffed we mayn't have biffed you mayn't have biffed they mayn't have biffed	I mayn't have been biffing you mayn't have been biffing he mayn't have been biffing we mayn't have been biffing you mayn't have been biffing they mayn't have been biffing

Interrogative form

Simple form	V-ing form
may I biff? may you biff? may he biff? may we biff? may you biff? may they biff?	may I be biffing? may you be biffing? may he be biffing? may we be biffing? may you be biffing? may they be biffing?
Perfect	V-ing perfect
may I have biffed? may you have biffed? may he have biffed? may we have biffed? may you have biffed? may they have biffed?	may I have been biffing? may you have been biffing? may he have been biffing? may we have been biffing? may you have been biffing? may they have been biffing?

Interro-negative form

Simple form	V-ing form
mayn't I biff? mayn't you biff? mayn't he biff? mayn't we biff? mayn't you biff? mayn't they biff?	mayn't I be biffing? mayn't you be biffing? mayn't he be biffing? mayn't we be biffing? mayn't you be biffing? mayn't they be biffing?
Perfect	V-ing perfect
mayn't I have biffed? mayn't you have biffed? mayn't he have biffed? mayn't we have biffed? mayn't you have biffed? mayn't they have biffed?	mayn't I have been biffing? mayn't you have been biffing? mayn't he have been biffing? mayn't we have been biffing? mayn't you have been biffing? mayn't they have been biffing?