may frown
Regular verb: frown - frowned- frowned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may frown
you may frown
she may frown
we may frown
you may frown
they may frown 	I may be frowning
you may be frowning
she may be frowning
we may be frowning
you may be frowning
they may be frowning	I may have frowned
you may have frowned
she may have frowned
we may have frowned
you may have frowned
they may have frowned	I may have been frowning
you may have been frowning
she may have been frowning
we may have been frowning
you may have been frowning
they may have been frowning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't frown
you mayn't frown
she mayn't frown
we mayn't frown
you mayn't frown
they mayn't frown 	I mayn't be frowning
you mayn't be frowning
she mayn't be frowning
we mayn't be frowning
you mayn't be frowning
they mayn't be frowning	I mayn't have frowned
you mayn't have frowned
she mayn't have frowned
we mayn't have frowned
you mayn't have frowned
they mayn't have frowned	I mayn't have been frowning
you mayn't have been frowning
she mayn't have been frowning
we mayn't have been frowning
you mayn't have been frowning
they mayn't have been frowning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I frown?
may you frown?
may she frown?
may we frown?
may you frown?
may they frown? 	may I be frowning?
may you be frowning?
may she be frowning?
may we be frowning?
may you be frowning?
may they be frowning? 	may I have frowned?
may you have frowned?
may she have frowned?
may we have frowned?
may you have frowned?
may they have frowned? 	may I have been frowning?
may you have been frowning?
may she have been frowning?
may we have been frowning?
may you have been frowning?
may they have been frowning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I frown?
mayn't you frown?
mayn't she frown?
mayn't we frown?
mayn't you frown?
mayn't they frown? 	mayn't I be frowning?
mayn't you be frowning?
mayn't she be frowning?
mayn't we be frowning?
mayn't you be frowning?
mayn't they be frowning? 	mayn't I have frowned?
mayn't you have frowned?
mayn't she have frowned?
mayn't we have frowned?
mayn't you have frowned?
mayn't they have frowned? 	mayn't I have been frowning?
mayn't you have been frowning?
mayn't she have been frowning?
mayn't we have been frowning?
mayn't you have been frowning?
mayn't they have been frowning?