English verb conjugation
MAY CALCULATE

Regular verb: calculate - calculated - calculated

Affirmation

Simple form	V-ing form
I may calculate you may calculate he may calculate we may calculate you may calculate they may calculate	I may be calculating you may be calculating he may be calculating we may be calculating you may be calculating they may be calculating
Perfect	V-ing perfect
I may have calculated you may have calculated he may have calculated we may have calculated you may have calculated they may have calculated	I may have been calculating you may have been calculating he may have been calculating we may have been calculating you may have been calculating they may have been calculating

Negation

Simple form	V-ing form
I mayn't calculate you mayn't calculate he mayn't calculate we mayn't calculate you mayn't calculate they mayn't calculate	I mayn't be calculating you mayn't be calculating he mayn't be calculating we mayn't be calculating you mayn't be calculating they mayn't be calculating
Perfect	V-ing perfect
I mayn't have calculated you mayn't have calculated he mayn't have calculated we mayn't have calculated you mayn't have calculated they mayn't have calculated	I mayn't have been calculating you mayn't have been calculating he mayn't have been calculating we mayn't have been calculating you mayn't have been calculating they mayn't have been calculating

Interrogative form

Simple form	V-ing form
may I calculate? may you calculate? may he calculate? may we calculate? may you calculate? may they calculate?	may I be calculating? may you be calculating? may he be calculating? may we be calculating? may you be calculating? may they be calculating?
Perfect	V-ing perfect
may I have calculated? may you have calculated? may he have calculated? may we have calculated? may you have calculated? may they have calculated?	may I have been calculating? may you have been calculating? may he have been calculating? may we have been calculating? may you have been calculating? may they have been calculating?

Interro-negative form

Simple form	V-ing form
mayn't I calculate? mayn't you calculate? mayn't he calculate? mayn't we calculate? mayn't you calculate? mayn't they calculate?	mayn't I be calculating? mayn't you be calculating? mayn't he be calculating? mayn't we be calculating? mayn't you be calculating? mayn't they be calculating?
Perfect	V-ing perfect
mayn't I have calculated? mayn't you have calculated? mayn't he have calculated? mayn't we have calculated? mayn't you have calculated? mayn't they have calculated?	mayn't I have been calculating? mayn't you have been calculating? mayn't he have been calculating? mayn't we have been calculating? mayn't you have been calculating? mayn't they have been calculating?