may proffer
Regular verb: proffer - proffered- proffered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may proffer
you may proffer
he may proffer
we may proffer
you may proffer
they may proffer 	I may be proffering
you may be proffering
he may be proffering
we may be proffering
you may be proffering
they may be proffering	I may have proffered
you may have proffered
he may have proffered
we may have proffered
you may have proffered
they may have proffered	I may have been proffering
you may have been proffering
he may have been proffering
we may have been proffering
you may have been proffering
they may have been proffering	

Negation 	
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I mayn't proffer
you mayn't proffer
he mayn't proffer
we mayn't proffer
you mayn't proffer
they mayn't proffer 	I mayn't be proffering
you mayn't be proffering
he mayn't be proffering
we mayn't be proffering
you mayn't be proffering
they mayn't be proffering	I mayn't have proffered
you mayn't have proffered
he mayn't have proffered
we mayn't have proffered
you mayn't have proffered
they mayn't have proffered	I mayn't have been proffering
you mayn't have been proffering
he mayn't have been proffering
we mayn't have been proffering
you mayn't have been proffering
they mayn't have been proffering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I proffer?
may you proffer?
may he proffer?
may we proffer?
may you proffer?
may they proffer? 	may I be proffering?
may you be proffering?
may he be proffering?
may we be proffering?
may you be proffering?
may they be proffering? 	may I have proffered?
may you have proffered?
may he have proffered?
may we have proffered?
may you have proffered?
may they have proffered? 	may I have been proffering?
may you have been proffering?
may he have been proffering?
may we have been proffering?
may you have been proffering?
may they have been proffering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I proffer?
mayn't you proffer?
mayn't he proffer?
mayn't we proffer?
mayn't you proffer?
mayn't they proffer? 	mayn't I be proffering?
mayn't you be proffering?
mayn't he be proffering?
mayn't we be proffering?
mayn't you be proffering?
mayn't they be proffering? 	mayn't I have proffered?
mayn't you have proffered?
mayn't he have proffered?
mayn't we have proffered?
mayn't you have proffered?
mayn't they have proffered? 	mayn't I have been proffering?
mayn't you have been proffering?
mayn't he have been proffering?
mayn't we have been proffering?
mayn't you have been proffering?
mayn't they have been proffering?