may greaten
Regular verb: greaten - greatened- greatened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may greaten
you may greaten
he may greaten
we may greaten
you may greaten
they may greaten 	I may be greatening
you may be greatening
he may be greatening
we may be greatening
you may be greatening
they may be greatening	I may have greatened
you may have greatened
he may have greatened
we may have greatened
you may have greatened
they may have greatened	I may have been greatening
you may have been greatening
he may have been greatening
we may have been greatening
you may have been greatening
they may have been greatening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't greaten
you mayn't greaten
he mayn't greaten
we mayn't greaten
you mayn't greaten
they mayn't greaten 	I mayn't be greatening
you mayn't be greatening
he mayn't be greatening
we mayn't be greatening
you mayn't be greatening
they mayn't be greatening	I mayn't have greatened
you mayn't have greatened
he mayn't have greatened
we mayn't have greatened
you mayn't have greatened
they mayn't have greatened	I mayn't have been greatening
you mayn't have been greatening
he mayn't have been greatening
we mayn't have been greatening
you mayn't have been greatening
they mayn't have been greatening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I greaten?
may you greaten?
may he greaten?
may we greaten?
may you greaten?
may they greaten? 	may I be greatening?
may you be greatening?
may he be greatening?
may we be greatening?
may you be greatening?
may they be greatening? 	may I have greatened?
may you have greatened?
may he have greatened?
may we have greatened?
may you have greatened?
may they have greatened? 	may I have been greatening?
may you have been greatening?
may he have been greatening?
may we have been greatening?
may you have been greatening?
may they have been greatening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I greaten?
mayn't you greaten?
mayn't he greaten?
mayn't we greaten?
mayn't you greaten?
mayn't they greaten? 	mayn't I be greatening?
mayn't you be greatening?
mayn't he be greatening?
mayn't we be greatening?
mayn't you be greatening?
mayn't they be greatening? 	mayn't I have greatened?
mayn't you have greatened?
mayn't he have greatened?
mayn't we have greatened?
mayn't you have greatened?
mayn't they have greatened? 	mayn't I have been greatening?
mayn't you have been greatening?
mayn't he have been greatening?
mayn't we have been greatening?
mayn't you have been greatening?
mayn't they have been greatening?