may endorse
Regular verb: endorse - endorsed- endorsed

Affirmation 	
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I may endorse
you may endorse
she may endorse
we may endorse
you may endorse
they may endorse 	I may be endorsing
you may be endorsing
she may be endorsing
we may be endorsing
you may be endorsing
they may be endorsing	I may have endorsed
you may have endorsed
she may have endorsed
we may have endorsed
you may have endorsed
they may have endorsed	I may have been endorsing
you may have been endorsing
she may have been endorsing
we may have been endorsing
you may have been endorsing
they may have been endorsing	

Negation 	
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I mayn't endorse
you mayn't endorse
she mayn't endorse
we mayn't endorse
you mayn't endorse
they mayn't endorse 	I mayn't be endorsing
you mayn't be endorsing
she mayn't be endorsing
we mayn't be endorsing
you mayn't be endorsing
they mayn't be endorsing	I mayn't have endorsed
you mayn't have endorsed
she mayn't have endorsed
we mayn't have endorsed
you mayn't have endorsed
they mayn't have endorsed	I mayn't have been endorsing
you mayn't have been endorsing
she mayn't have been endorsing
we mayn't have been endorsing
you mayn't have been endorsing
they mayn't have been endorsing	

Interrogative form 	
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may I endorse?
may you endorse?
may she endorse?
may we endorse?
may you endorse?
may they endorse? 	may I be endorsing?
may you be endorsing?
may she be endorsing?
may we be endorsing?
may you be endorsing?
may they be endorsing? 	may I have endorsed?
may you have endorsed?
may she have endorsed?
may we have endorsed?
may you have endorsed?
may they have endorsed? 	may I have been endorsing?
may you have been endorsing?
may she have been endorsing?
may we have been endorsing?
may you have been endorsing?
may they have been endorsing? 	

Interro-negative form 	
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mayn't I endorse?
mayn't you endorse?
mayn't she endorse?
mayn't we endorse?
mayn't you endorse?
mayn't they endorse? 	mayn't I be endorsing?
mayn't you be endorsing?
mayn't she be endorsing?
mayn't we be endorsing?
mayn't you be endorsing?
mayn't they be endorsing? 	mayn't I have endorsed?
mayn't you have endorsed?
mayn't she have endorsed?
mayn't we have endorsed?
mayn't you have endorsed?
mayn't they have endorsed? 	mayn't I have been endorsing?
mayn't you have been endorsing?
mayn't she have been endorsing?
mayn't we have been endorsing?
mayn't you have been endorsing?
mayn't they have been endorsing?