English verb conjugation
CAN FACTOR

Regular verb: factor - factored - factored

Affirmation

Simple form	V-ing form
I can factor you can factor she can factor we can factor you can factor they can factor	I can be factoring you can be factoring she can be factoring we can be factoring you can be factoring they can be factoring
Perfect	V-ing perfect
I can have factored you can have factored she can have factored we can have factored you can have factored they can have factored	I can have been factoring you can have been factoring she can have been factoring we can have been factoring you can have been factoring they can have been factoring

Negation

Simple form	V-ing form
I can't factor you can't factor she can't factor we can't factor you can't factor they can't factor	I can't be factoring you can't be factoring she can't be factoring we can't be factoring you can't be factoring they can't be factoring
Perfect	V-ing perfect
I can't have factored you can't have factored she can't have factored we can't have factored you can't have factored they can't have factored	I can't have been factoring you can't have been factoring she can't have been factoring we can't have been factoring you can't have been factoring they can't have been factoring

Interrogative form

Simple form	V-ing form
can I factor? can you factor? can she factor? can we factor? can you factor? can they factor?	can I be factoring? can you be factoring? can she be factoring? can we be factoring? can you be factoring? can they be factoring?
Perfect	V-ing perfect
can I have factored? can you have factored? can she have factored? can we have factored? can you have factored? can they have factored?	can I have been factoring? can you have been factoring? can she have been factoring? can we have been factoring? can you have been factoring? can they have been factoring?

Interro-negative form

Simple form	V-ing form
can't I factor? can't you factor? can't she factor? can't we factor? can't you factor? can't they factor?	can't I be factoring? can't you be factoring? can't she be factoring? can't we be factoring? can't you be factoring? can't they be factoring?
Perfect	V-ing perfect
can't I have factored? can't you have factored? can't she have factored? can't we have factored? can't you have factored? can't they have factored?	can't I have been factoring? can't you have been factoring? can't she have been factoring? can't we have been factoring? can't you have been factoring? can't they have been factoring?