may lumber
Regular verb: lumber - lumbered- lumbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may lumber
you may lumber
she may lumber
we may lumber
you may lumber
they may lumber 	I may be lumbering
you may be lumbering
she may be lumbering
we may be lumbering
you may be lumbering
they may be lumbering	I may have lumbered
you may have lumbered
she may have lumbered
we may have lumbered
you may have lumbered
they may have lumbered	I may have been lumbering
you may have been lumbering
she may have been lumbering
we may have been lumbering
you may have been lumbering
they may have been lumbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't lumber
you mayn't lumber
she mayn't lumber
we mayn't lumber
you mayn't lumber
they mayn't lumber 	I mayn't be lumbering
you mayn't be lumbering
she mayn't be lumbering
we mayn't be lumbering
you mayn't be lumbering
they mayn't be lumbering	I mayn't have lumbered
you mayn't have lumbered
she mayn't have lumbered
we mayn't have lumbered
you mayn't have lumbered
they mayn't have lumbered	I mayn't have been lumbering
you mayn't have been lumbering
she mayn't have been lumbering
we mayn't have been lumbering
you mayn't have been lumbering
they mayn't have been lumbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I lumber?
may you lumber?
may she lumber?
may we lumber?
may you lumber?
may they lumber? 	may I be lumbering?
may you be lumbering?
may she be lumbering?
may we be lumbering?
may you be lumbering?
may they be lumbering? 	may I have lumbered?
may you have lumbered?
may she have lumbered?
may we have lumbered?
may you have lumbered?
may they have lumbered? 	may I have been lumbering?
may you have been lumbering?
may she have been lumbering?
may we have been lumbering?
may you have been lumbering?
may they have been lumbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I lumber?
mayn't you lumber?
mayn't she lumber?
mayn't we lumber?
mayn't you lumber?
mayn't they lumber? 	mayn't I be lumbering?
mayn't you be lumbering?
mayn't she be lumbering?
mayn't we be lumbering?
mayn't you be lumbering?
mayn't they be lumbering? 	mayn't I have lumbered?
mayn't you have lumbered?
mayn't she have lumbered?
mayn't we have lumbered?
mayn't you have lumbered?
mayn't they have lumbered? 	mayn't I have been lumbering?
mayn't you have been lumbering?
mayn't she have been lumbering?
mayn't we have been lumbering?
mayn't you have been lumbering?
mayn't they have been lumbering?