English verb conjugation
MAY PREBOARD

Regular verb: preboard - preboarded - preboarded

Affirmation

Simple form	V-ing form
I may preboard you may preboard he may preboard we may preboard you may preboard they may preboard	I may be preboarding you may be preboarding he may be preboarding we may be preboarding you may be preboarding they may be preboarding
Perfect	V-ing perfect
I may have preboarded you may have preboarded he may have preboarded we may have preboarded you may have preboarded they may have preboarded	I may have been preboarding you may have been preboarding he may have been preboarding we may have been preboarding you may have been preboarding they may have been preboarding

Negation

Simple form	V-ing form
I mayn't preboard you mayn't preboard he mayn't preboard we mayn't preboard you mayn't preboard they mayn't preboard	I mayn't be preboarding you mayn't be preboarding he mayn't be preboarding we mayn't be preboarding you mayn't be preboarding they mayn't be preboarding
Perfect	V-ing perfect
I mayn't have preboarded you mayn't have preboarded he mayn't have preboarded we mayn't have preboarded you mayn't have preboarded they mayn't have preboarded	I mayn't have been preboarding you mayn't have been preboarding he mayn't have been preboarding we mayn't have been preboarding you mayn't have been preboarding they mayn't have been preboarding

Interrogative form

Simple form	V-ing form
may I preboard? may you preboard? may he preboard? may we preboard? may you preboard? may they preboard?	may I be preboarding? may you be preboarding? may he be preboarding? may we be preboarding? may you be preboarding? may they be preboarding?
Perfect	V-ing perfect
may I have preboarded? may you have preboarded? may he have preboarded? may we have preboarded? may you have preboarded? may they have preboarded?	may I have been preboarding? may you have been preboarding? may he have been preboarding? may we have been preboarding? may you have been preboarding? may they have been preboarding?

Interro-negative form

Simple form	V-ing form
mayn't I preboard? mayn't you preboard? mayn't he preboard? mayn't we preboard? mayn't you preboard? mayn't they preboard?	mayn't I be preboarding? mayn't you be preboarding? mayn't he be preboarding? mayn't we be preboarding? mayn't you be preboarding? mayn't they be preboarding?
Perfect	V-ing perfect
mayn't I have preboarded? mayn't you have preboarded? mayn't he have preboarded? mayn't we have preboarded? mayn't you have preboarded? mayn't they have preboarded?	mayn't I have been preboarding? mayn't you have been preboarding? mayn't he have been preboarding? mayn't we have been preboarding? mayn't you have been preboarding? mayn't they have been preboarding?