English verb conjugation
MAY UNDERSIGN

Regular verb: undersign - undersigned - undersigned

Affirmation

Simple form	V-ing form
I may undersign you may undersign he may undersign we may undersign you may undersign they may undersign	I may be undersigning you may be undersigning he may be undersigning we may be undersigning you may be undersigning they may be undersigning
Perfect	V-ing perfect
I may have undersigned you may have undersigned he may have undersigned we may have undersigned you may have undersigned they may have undersigned	I may have been undersigning you may have been undersigning he may have been undersigning we may have been undersigning you may have been undersigning they may have been undersigning

Negation

Simple form	V-ing form
I mayn't undersign you mayn't undersign he mayn't undersign we mayn't undersign you mayn't undersign they mayn't undersign	I mayn't be undersigning you mayn't be undersigning he mayn't be undersigning we mayn't be undersigning you mayn't be undersigning they mayn't be undersigning
Perfect	V-ing perfect
I mayn't have undersigned you mayn't have undersigned he mayn't have undersigned we mayn't have undersigned you mayn't have undersigned they mayn't have undersigned	I mayn't have been undersigning you mayn't have been undersigning he mayn't have been undersigning we mayn't have been undersigning you mayn't have been undersigning they mayn't have been undersigning

Interrogative form

Simple form	V-ing form
may I undersign? may you undersign? may he undersign? may we undersign? may you undersign? may they undersign?	may I be undersigning? may you be undersigning? may he be undersigning? may we be undersigning? may you be undersigning? may they be undersigning?
Perfect	V-ing perfect
may I have undersigned? may you have undersigned? may he have undersigned? may we have undersigned? may you have undersigned? may they have undersigned?	may I have been undersigning? may you have been undersigning? may he have been undersigning? may we have been undersigning? may you have been undersigning? may they have been undersigning?

Interro-negative form

Simple form	V-ing form
mayn't I undersign? mayn't you undersign? mayn't he undersign? mayn't we undersign? mayn't you undersign? mayn't they undersign?	mayn't I be undersigning? mayn't you be undersigning? mayn't he be undersigning? mayn't we be undersigning? mayn't you be undersigning? mayn't they be undersigning?
Perfect	V-ing perfect
mayn't I have undersigned? mayn't you have undersigned? mayn't he have undersigned? mayn't we have undersigned? mayn't you have undersigned? mayn't they have undersigned?	mayn't I have been undersigning? mayn't you have been undersigning? mayn't he have been undersigning? mayn't we have been undersigning? mayn't you have been undersigning? mayn't they have been undersigning?