may sign
Regular verb: sign - signed- signed

Affirmation 	
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I may sign
you may sign
she may sign
we may sign
you may sign
they may sign 	I may be signing
you may be signing
she may be signing
we may be signing
you may be signing
they may be signing	I may have signed
you may have signed
she may have signed
we may have signed
you may have signed
they may have signed	I may have been signing
you may have been signing
she may have been signing
we may have been signing
you may have been signing
they may have been signing	

Negation 	
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I mayn't sign
you mayn't sign
she mayn't sign
we mayn't sign
you mayn't sign
they mayn't sign 	I mayn't be signing
you mayn't be signing
she mayn't be signing
we mayn't be signing
you mayn't be signing
they mayn't be signing	I mayn't have signed
you mayn't have signed
she mayn't have signed
we mayn't have signed
you mayn't have signed
they mayn't have signed	I mayn't have been signing
you mayn't have been signing
she mayn't have been signing
we mayn't have been signing
you mayn't have been signing
they mayn't have been signing	

Interrogative form 	
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may I sign?
may you sign?
may she sign?
may we sign?
may you sign?
may they sign? 	may I be signing?
may you be signing?
may she be signing?
may we be signing?
may you be signing?
may they be signing? 	may I have signed?
may you have signed?
may she have signed?
may we have signed?
may you have signed?
may they have signed? 	may I have been signing?
may you have been signing?
may she have been signing?
may we have been signing?
may you have been signing?
may they have been signing? 	

Interro-negative form 	
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mayn't I sign?
mayn't you sign?
mayn't she sign?
mayn't we sign?
mayn't you sign?
mayn't they sign? 	mayn't I be signing?
mayn't you be signing?
mayn't she be signing?
mayn't we be signing?
mayn't you be signing?
mayn't they be signing? 	mayn't I have signed?
mayn't you have signed?
mayn't she have signed?
mayn't we have signed?
mayn't you have signed?
mayn't they have signed? 	mayn't I have been signing?
mayn't you have been signing?
mayn't she have been signing?
mayn't we have been signing?
mayn't you have been signing?
mayn't they have been signing?