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 may not butter
you may not butter
she may not butter
we may not butter
you may not butter
they may not butter 	I may not be buttering
you may not be buttering
she may not be buttering
we may not be buttering
you may not be buttering
they may not be buttering	I may not have buttered
you may not have buttered
she may not have buttered
we may not have buttered
you may not have buttered
they may not have buttered	I may not have been buttering
you may not have been buttering
she may not have been buttering
we may not have been buttering
you may not have been buttering
they may not 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 	
may I not butter?
may you not butter?
may she not butter?
may we not butter?
may you not butter?
may they not butter? 	may I not be buttering?
may you not be buttering?
may she not be buttering?
may we not be buttering?
may you not be buttering?
may they not be buttering? 	may I not have buttered?
may you not have buttered?
may she not have buttered?
may we not have buttered?
may you not have buttered?
may they not have buttered? 	may I not have been buttering?
may you not have been buttering?
may she not have been buttering?
may we not have been buttering?
may you not have been buttering?
may they not have been buttering?