English verb conjugation
MAY BASE

Regular verb: base - based - based

Affirmation

Simple form	V-ing form
I may base you may base he may base we may base you may base they may base	I may be basing you may be basing he may be basing we may be basing you may be basing they may be basing
Perfect	V-ing perfect
I may have based you may have based he may have based we may have based you may have based they may have based	I may have been basing you may have been basing he may have been basing we may have been basing you may have been basing they may have been basing

Negation

Simple form	V-ing form
I may not base you may not base he may not base we may not base you may not base they may not base	I may not be basing you may not be basing he may not be basing we may not be basing you may not be basing they may not be basing
Perfect	V-ing perfect
I may not have based you may not have based he may not have based we may not have based you may not have based they may not have based	I may not have been basing you may not have been basing he may not have been basing we may not have been basing you may not have been basing they may not have been basing

Interrogative form

Simple form	V-ing form
may I base? may you base? may he base? may we base? may you base? may they base?	may I be basing? may you be basing? may he be basing? may we be basing? may you be basing? may they be basing?
Perfect	V-ing perfect
may I have based? may you have based? may he have based? may we have based? may you have based? may they have based?	may I have been basing? may you have been basing? may he have been basing? may we have been basing? may you have been basing? may they have been basing?

Interro-negative form

Simple form	V-ing form
may I not base? may you not base? may he not base? may we not base? may you not base? may they not base?	may I not be basing? may you not be basing? may he not be basing? may we not be basing? may you not be basing? may they not be basing?
Perfect	V-ing perfect
may I not have based? may you not have based? may he not have based? may we not have based? may you not have based? may they not have based?	may I not have been basing? may you not have been basing? may he not have been basing? may we not have been basing? may you not have been basing? may they not have been basing?