may heft
Regular verb: heft - hefted- hefted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may heft
you may heft
he may heft
we may heft
you may heft
they may heft 	I may be hefting
you may be hefting
he may be hefting
we may be hefting
you may be hefting
they may be hefting	I may have hefted
you may have hefted
he may have hefted
we may have hefted
you may have hefted
they may have hefted	I may have been hefting
you may have been hefting
he may have been hefting
we may have been hefting
you may have been hefting
they may have been hefting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't heft
you mayn't heft
he mayn't heft
we mayn't heft
you mayn't heft
they mayn't heft 	I mayn't be hefting
you mayn't be hefting
he mayn't be hefting
we mayn't be hefting
you mayn't be hefting
they mayn't be hefting	I mayn't have hefted
you mayn't have hefted
he mayn't have hefted
we mayn't have hefted
you mayn't have hefted
they mayn't have hefted	I mayn't have been hefting
you mayn't have been hefting
he mayn't have been hefting
we mayn't have been hefting
you mayn't have been hefting
they mayn't have been hefting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I heft?
may you heft?
may he heft?
may we heft?
may you heft?
may they heft? 	may I be hefting?
may you be hefting?
may he be hefting?
may we be hefting?
may you be hefting?
may they be hefting? 	may I have hefted?
may you have hefted?
may he have hefted?
may we have hefted?
may you have hefted?
may they have hefted? 	may I have been hefting?
may you have been hefting?
may he have been hefting?
may we have been hefting?
may you have been hefting?
may they have been hefting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I heft?
mayn't you heft?
mayn't he heft?
mayn't we heft?
mayn't you heft?
mayn't they heft? 	mayn't I be hefting?
mayn't you be hefting?
mayn't he be hefting?
mayn't we be hefting?
mayn't you be hefting?
mayn't they be hefting? 	mayn't I have hefted?
mayn't you have hefted?
mayn't he have hefted?
mayn't we have hefted?
mayn't you have hefted?
mayn't they have hefted? 	mayn't I have been hefting?
mayn't you have been hefting?
mayn't he have been hefting?
mayn't we have been hefting?
mayn't you have been hefting?
mayn't they have been hefting?