may smile
Regular verb: smile - smiled- smiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may smile
you may smile
she may smile
we may smile
you may smile
they may smile 	I may be smiling
you may be smiling
she may be smiling
we may be smiling
you may be smiling
they may be smiling	I may have smiled
you may have smiled
she may have smiled
we may have smiled
you may have smiled
they may have smiled	I may have been smiling
you may have been smiling
she may have been smiling
we may have been smiling
you may have been smiling
they may have been smiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't smile
you mayn't smile
she mayn't smile
we mayn't smile
you mayn't smile
they mayn't smile 	I mayn't be smiling
you mayn't be smiling
she mayn't be smiling
we mayn't be smiling
you mayn't be smiling
they mayn't be smiling	I mayn't have smiled
you mayn't have smiled
she mayn't have smiled
we mayn't have smiled
you mayn't have smiled
they mayn't have smiled	I mayn't have been smiling
you mayn't have been smiling
she mayn't have been smiling
we mayn't have been smiling
you mayn't have been smiling
they mayn't have been smiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I smile?
may you smile?
may she smile?
may we smile?
may you smile?
may they smile? 	may I be smiling?
may you be smiling?
may she be smiling?
may we be smiling?
may you be smiling?
may they be smiling? 	may I have smiled?
may you have smiled?
may she have smiled?
may we have smiled?
may you have smiled?
may they have smiled? 	may I have been smiling?
may you have been smiling?
may she have been smiling?
may we have been smiling?
may you have been smiling?
may they have been smiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I smile?
mayn't you smile?
mayn't she smile?
mayn't we smile?
mayn't you smile?
mayn't they smile? 	mayn't I be smiling?
mayn't you be smiling?
mayn't she be smiling?
mayn't we be smiling?
mayn't you be smiling?
mayn't they be smiling? 	mayn't I have smiled?
mayn't you have smiled?
mayn't she have smiled?
mayn't we have smiled?
mayn't you have smiled?
mayn't they have smiled? 	mayn't I have been smiling?
mayn't you have been smiling?
mayn't she have been smiling?
mayn't we have been smiling?
mayn't you have been smiling?
mayn't they have been smiling?