may invoice
Verbo regular: invoice - invoiced- invoiced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?