may blister
Regular verb: blister - blistered- blistered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may blister
you may blister
she may blister
we may blister
you may blister
they may blister 	I may be blistering
you may be blistering
she may be blistering
we may be blistering
you may be blistering
they may be blistering	I may have blistered
you may have blistered
she may have blistered
we may have blistered
you may have blistered
they may have blistered	I may have been blistering
you may have been blistering
she may have been blistering
we may have been blistering
you may have been blistering
they may have been blistering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't blister
you mayn't blister
she mayn't blister
we mayn't blister
you mayn't blister
they mayn't blister 	I mayn't be blistering
you mayn't be blistering
she mayn't be blistering
we mayn't be blistering
you mayn't be blistering
they mayn't be blistering	I mayn't have blistered
you mayn't have blistered
she mayn't have blistered
we mayn't have blistered
you mayn't have blistered
they mayn't have blistered	I mayn't have been blistering
you mayn't have been blistering
she mayn't have been blistering
we mayn't have been blistering
you mayn't have been blistering
they mayn't have been blistering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I blister?
may you blister?
may she blister?
may we blister?
may you blister?
may they blister? 	may I be blistering?
may you be blistering?
may she be blistering?
may we be blistering?
may you be blistering?
may they be blistering? 	may I have blistered?
may you have blistered?
may she have blistered?
may we have blistered?
may you have blistered?
may they have blistered? 	may I have been blistering?
may you have been blistering?
may she have been blistering?
may we have been blistering?
may you have been blistering?
may they have been blistering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I blister?
mayn't you blister?
mayn't she blister?
mayn't we blister?
mayn't you blister?
mayn't they blister? 	mayn't I be blistering?
mayn't you be blistering?
mayn't she be blistering?
mayn't we be blistering?
mayn't you be blistering?
mayn't they be blistering? 	mayn't I have blistered?
mayn't you have blistered?
mayn't she have blistered?
mayn't we have blistered?
mayn't you have blistered?
mayn't they have blistered? 	mayn't I have been blistering?
mayn't you have been blistering?
mayn't she have been blistering?
mayn't we have been blistering?
mayn't you have been blistering?
mayn't they have been blistering?