English verb conjugation
CAN FIRE

Regular verb: fire - fired - fired

Affirmation

Simple form	V-ing form
I can fire you can fire he can fire we can fire you can fire they can fire	I can be firing you can be firing he can be firing we can be firing you can be firing they can be firing
Perfect	V-ing perfect
I can have fired you can have fired he can have fired we can have fired you can have fired they can have fired	I can have been firing you can have been firing he can have been firing we can have been firing you can have been firing they can have been firing

Negation

Simple form	V-ing form
I can't fire you can't fire he can't fire we can't fire you can't fire they can't fire	I can't be firing you can't be firing he can't be firing we can't be firing you can't be firing they can't be firing
Perfect	V-ing perfect
I can't have fired you can't have fired he can't have fired we can't have fired you can't have fired they can't have fired	I can't have been firing you can't have been firing he can't have been firing we can't have been firing you can't have been firing they can't have been firing

Interrogative form

Simple form	V-ing form
can I fire? can you fire? can he fire? can we fire? can you fire? can they fire?	can I be firing? can you be firing? can he be firing? can we be firing? can you be firing? can they be firing?
Perfect	V-ing perfect
can I have fired? can you have fired? can he have fired? can we have fired? can you have fired? can they have fired?	can I have been firing? can you have been firing? can he have been firing? can we have been firing? can you have been firing? can they have been firing?

Interro-negative form

Simple form	V-ing form
can't I fire? can't you fire? can't he fire? can't we fire? can't you fire? can't they fire?	can't I be firing? can't you be firing? can't he be firing? can't we be firing? can't you be firing? can't they be firing?
Perfect	V-ing perfect
can't I have fired? can't you have fired? can't he have fired? can't we have fired? can't you have fired? can't they have fired?	can't I have been firing? can't you have been firing? can't he have been firing? can't we have been firing? can't you have been firing? can't they have been firing?