may stammer
Regular verb: stammer - stammered- stammered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may stammer
you may stammer
she may stammer
we may stammer
you may stammer
they may stammer 	I may be stammering
you may be stammering
she may be stammering
we may be stammering
you may be stammering
they may be stammering	I may have stammered
you may have stammered
she may have stammered
we may have stammered
you may have stammered
they may have stammered	I may have been stammering
you may have been stammering
she may have been stammering
we may have been stammering
you may have been stammering
they may have been stammering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't stammer
you mayn't stammer
she mayn't stammer
we mayn't stammer
you mayn't stammer
they mayn't stammer 	I mayn't be stammering
you mayn't be stammering
she mayn't be stammering
we mayn't be stammering
you mayn't be stammering
they mayn't be stammering	I mayn't have stammered
you mayn't have stammered
she mayn't have stammered
we mayn't have stammered
you mayn't have stammered
they mayn't have stammered	I mayn't have been stammering
you mayn't have been stammering
she mayn't have been stammering
we mayn't have been stammering
you mayn't have been stammering
they mayn't have been stammering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I stammer?
may you stammer?
may she stammer?
may we stammer?
may you stammer?
may they stammer? 	may I be stammering?
may you be stammering?
may she be stammering?
may we be stammering?
may you be stammering?
may they be stammering? 	may I have stammered?
may you have stammered?
may she have stammered?
may we have stammered?
may you have stammered?
may they have stammered? 	may I have been stammering?
may you have been stammering?
may she have been stammering?
may we have been stammering?
may you have been stammering?
may they have been stammering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I stammer?
mayn't you stammer?
mayn't she stammer?
mayn't we stammer?
mayn't you stammer?
mayn't they stammer? 	mayn't I be stammering?
mayn't you be stammering?
mayn't she be stammering?
mayn't we be stammering?
mayn't you be stammering?
mayn't they be stammering? 	mayn't I have stammered?
mayn't you have stammered?
mayn't she have stammered?
mayn't we have stammered?
mayn't you have stammered?
mayn't they have stammered? 	mayn't I have been stammering?
mayn't you have been stammering?
mayn't she have been stammering?
mayn't we have been stammering?
mayn't you have been stammering?
mayn't they have been stammering?