English verb conjugation
MAY MASS

Regular verb: mass - massed - massed

Affirmation

Simple form	V-ing form
I may mass you may mass he may mass we may mass you may mass they may mass	I may be massing you may be massing he may be massing we may be massing you may be massing they may be massing
Perfect	V-ing perfect
I may have massed you may have massed he may have massed we may have massed you may have massed they may have massed	I may have been massing you may have been massing he may have been massing we may have been massing you may have been massing they may have been massing

Negation

Simple form	V-ing form
I mayn't mass you mayn't mass he mayn't mass we mayn't mass you mayn't mass they mayn't mass	I mayn't be massing you mayn't be massing he mayn't be massing we mayn't be massing you mayn't be massing they mayn't be massing
Perfect	V-ing perfect
I mayn't have massed you mayn't have massed he mayn't have massed we mayn't have massed you mayn't have massed they mayn't have massed	I mayn't have been massing you mayn't have been massing he mayn't have been massing we mayn't have been massing you mayn't have been massing they mayn't have been massing

Interrogative form

Simple form	V-ing form
may I mass? may you mass? may he mass? may we mass? may you mass? may they mass?	may I be massing? may you be massing? may he be massing? may we be massing? may you be massing? may they be massing?
Perfect	V-ing perfect
may I have massed? may you have massed? may he have massed? may we have massed? may you have massed? may they have massed?	may I have been massing? may you have been massing? may he have been massing? may we have been massing? may you have been massing? may they have been massing?

Interro-negative form

Simple form	V-ing form
mayn't I mass? mayn't you mass? mayn't he mass? mayn't we mass? mayn't you mass? mayn't they mass?	mayn't I be massing? mayn't you be massing? mayn't he be massing? mayn't we be massing? mayn't you be massing? mayn't they be massing?
Perfect	V-ing perfect
mayn't I have massed? mayn't you have massed? mayn't he have massed? mayn't we have massed? mayn't you have massed? mayn't they have massed?	mayn't I have been massing? mayn't you have been massing? mayn't he have been massing? mayn't we have been massing? mayn't you have been massing? mayn't they have been massing?