English verb conjugation
CAN END

Regular verb: end - ended - ended

Affirmation

Simple form	V-ing form
I can end you can end he can end we can end you can end they can end	I can be ending you can be ending he can be ending we can be ending you can be ending they can be ending
Perfect	V-ing perfect
I can have ended you can have ended he can have ended we can have ended you can have ended they can have ended	I can have been ending you can have been ending he can have been ending we can have been ending you can have been ending they can have been ending

Negation

Simple form	V-ing form
I cannot end you cannot end he cannot end we cannot end you cannot end they cannot end	I cannot be ending you cannot be ending he cannot be ending we cannot be ending you cannot be ending they cannot be ending
Perfect	V-ing perfect
I cannot have ended you cannot have ended he cannot have ended we cannot have ended you cannot have ended they cannot have ended	I cannot have been ending you cannot have been ending he cannot have been ending we cannot have been ending you cannot have been ending they cannot have been ending

Interrogative form

Simple form	V-ing form
can I end? can you end? can he end? can we end? can you end? can they end?	can I be ending? can you be ending? can he be ending? can we be ending? can you be ending? can they be ending?
Perfect	V-ing perfect
can I have ended? can you have ended? can he have ended? can we have ended? can you have ended? can they have ended?	can I have been ending? can you have been ending? can he have been ending? can we have been ending? can you have been ending? can they have been ending?

Interro-negative form

Simple form	V-ing form
can I not end? can you not end? can he not end? can we not end? can you not end? can they not end?	can I not be ending? can you not be ending? can he not be ending? can we not be ending? can you not be ending? can they not be ending?
Perfect	V-ing perfect
can I not have ended? can you not have ended? can he not have ended? can we not have ended? can you not have ended? can they not have ended?	can I not have been ending? can you not have been ending? can he not have been ending? can we not have been ending? can you not have been ending? can they not have been ending?