may butter
Regular verb: butter - buttered- buttered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may butter
you may butter
she may butter
we may butter
you may butter
they may butter 	I may be buttering
you may be buttering
she may be buttering
we may be buttering
you may be buttering
they may be buttering	I may have buttered
you may have buttered
she may have buttered
we may have buttered
you may have buttered
they may have buttered	I may have been buttering
you may have been buttering
she may have been buttering
we may have been buttering
you may have been buttering
they may have been buttering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't butter
you mayn't butter
she mayn't butter
we mayn't butter
you mayn't butter
they mayn't butter 	I mayn't be buttering
you mayn't be buttering
she mayn't be buttering
we mayn't be buttering
you mayn't be buttering
they mayn't be buttering	I mayn't have buttered
you mayn't have buttered
she mayn't have buttered
we mayn't have buttered
you mayn't have buttered
they mayn't have buttered	I mayn't have been buttering
you mayn't have been buttering
she mayn't have been buttering
we mayn't have been buttering
you mayn't have been buttering
they mayn't have been buttering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I butter?
may you butter?
may she butter?
may we butter?
may you butter?
may they butter? 	may I be buttering?
may you be buttering?
may she be buttering?
may we be buttering?
may you be buttering?
may they be buttering? 	may I have buttered?
may you have buttered?
may she have buttered?
may we have buttered?
may you have buttered?
may they have buttered? 	may I have been buttering?
may you have been buttering?
may she have been buttering?
may we have been buttering?
may you have been buttering?
may they have been buttering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I butter?
mayn't you butter?
mayn't she butter?
mayn't we butter?
mayn't you butter?
mayn't they butter? 	mayn't I be buttering?
mayn't you be buttering?
mayn't she be buttering?
mayn't we be buttering?
mayn't you be buttering?
mayn't they be buttering? 	mayn't I have buttered?
mayn't you have buttered?
mayn't she have buttered?
mayn't we have buttered?
mayn't you have buttered?
mayn't they have buttered? 	mayn't I have been buttering?
mayn't you have been buttering?
mayn't she have been buttering?
mayn't we have been buttering?
mayn't you have been buttering?
mayn't they have been buttering?