English verb conjugation
MAY INVOICE

Regular verb: invoice - invoiced - invoiced

Affirmation

Simple form	V-ing form
I may invoice you may invoice she may invoice we may invoice you may invoice they may invoice	I may be invoicing you may be invoicing she may be invoicing we may be invoicing you may be invoicing they may be invoicing
Perfect	V-ing perfect
I may have invoiced you may have invoiced she may have invoiced we may have invoiced you may have invoiced they may have invoiced	I may have been invoicing you may have been invoicing she may have been invoicing we may have been invoicing you may have been invoicing they may have been invoicing

Negation

Simple form	V-ing form
I may not invoice you may not invoice she may not invoice we may not invoice you may not invoice they may not invoice	I may not be invoicing you may not be invoicing she may not be invoicing we may not be invoicing you may not be invoicing they may not be invoicing
Perfect	V-ing perfect
I may not have invoiced you may not have invoiced she may not have invoiced we may not have invoiced you may not have invoiced they may not have invoiced	I may not have been invoicing you may not have been invoicing she may not have been invoicing we may not have been invoicing you may not have been invoicing they may not have been invoicing

Interrogative form

Simple form	V-ing form
may I invoice? may you invoice? may she invoice? may we invoice? may you invoice? may they invoice?	may I be invoicing? may you be invoicing? may she be invoicing? may we be invoicing? may you be invoicing? may they be invoicing?
Perfect	V-ing perfect
may I have invoiced? may you have invoiced? may she have invoiced? may we have invoiced? may you have invoiced? may they have invoiced?	may I have been invoicing? may you have been invoicing? may she have been invoicing? may we have been invoicing? may you have been invoicing? may they have been invoicing?

Interro-negative form

Simple form	V-ing form
may I not invoice? may you not invoice? may she not invoice? may we not invoice? may you not invoice? may they not invoice?	may I not be invoicing? may you not be invoicing? may she not be invoicing? may we not be invoicing? may you not be invoicing? may they not be invoicing?
Perfect	V-ing perfect
may I not have invoiced? may you not have invoiced? may she not have invoiced? may we not have invoiced? may you not have invoiced? may they not have invoiced?	may I not have been invoicing? may you not have been invoicing? may she not have been invoicing? may we not have been invoicing? may you not have been invoicing? may they not have been invoicing?