English verb conjugation
CAN FACTOR

Regular verb: factor - factored - factored

Affirmation

Simple form	V-ing form
I can factor you can factor he can factor we can factor you can factor they can factor	I can be factoring you can be factoring he 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 he 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 he 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 he 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 he 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 he 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 he 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 he factor? can we factor? can you factor? can they factor?	can I be factoring? can you be factoring? can he 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 he 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 he 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 he 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 he 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 he 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 he have been factoring? can't we have been factoring? can't you have been factoring? can't they have been factoring?