English verb conjugation
CAN INVOICE

Regular verb: invoice - invoiced - invoiced

Affirmation

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

Negation

Simple form	V-ing form
I can't invoice you can't invoice she can't invoice we can't invoice you can't invoice they can't invoice	I can't be invoicing you can't be invoicing she can't be invoicing we can't be invoicing you can't be invoicing they can't be invoicing
Perfect	V-ing perfect
I can't have invoiced you can't have invoiced she can't have invoiced we can't have invoiced you can't have invoiced they can't have invoiced	I can't have been invoicing you can't have been invoicing she can't have been invoicing we can't have been invoicing you can't have been invoicing they can't have been invoicing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I invoice? can't you invoice? can't she invoice? can't we invoice? can't you invoice? can't they invoice?	can't I be invoicing? can't you be invoicing? can't she be invoicing? can't we be invoicing? can't you be invoicing? can't they be invoicing?
Perfect	V-ing perfect
can't I have invoiced? can't you have invoiced? can't she have invoiced? can't we have invoiced? can't you have invoiced? can't they have invoiced?	can't I have been invoicing? can't you have been invoicing? can't she have been invoicing? can't we have been invoicing? can't you have been invoicing? can't they have been invoicing?