English verb conjugation
CAN KILL

Regular verb: kill - killed - killed

Affirmation

Simple form	V-ing form
I can kill you can kill she can kill we can kill you can kill they can kill	I can be killing you can be killing she can be killing we can be killing you can be killing they can be killing
Perfect	V-ing perfect
I can have killed you can have killed she can have killed we can have killed you can have killed they can have killed	I can have been killing you can have been killing she can have been killing we can have been killing you can have been killing they can have been killing

Negation

Simple form	V-ing form
I cannot kill you cannot kill she cannot kill we cannot kill you cannot kill they cannot kill	I cannot be killing you cannot be killing she cannot be killing we cannot be killing you cannot be killing they cannot be killing
Perfect	V-ing perfect
I cannot have killed you cannot have killed she cannot have killed we cannot have killed you cannot have killed they cannot have killed	I cannot have been killing you cannot have been killing she cannot have been killing we cannot have been killing you cannot have been killing they cannot have been killing

Interrogative form

Simple form	V-ing form
can I kill? can you kill? can she kill? can we kill? can you kill? can they kill?	can I be killing? can you be killing? can she be killing? can we be killing? can you be killing? can they be killing?
Perfect	V-ing perfect
can I have killed? can you have killed? can she have killed? can we have killed? can you have killed? can they have killed?	can I have been killing? can you have been killing? can she have been killing? can we have been killing? can you have been killing? can they have been killing?

Interro-negative form

Simple form	V-ing form
can I not kill? can you not kill? can she not kill? can we not kill? can you not kill? can they not kill?	can I not be killing? can you not be killing? can she not be killing? can we not be killing? can you not be killing? can they not be killing?
Perfect	V-ing perfect
can I not have killed? can you not have killed? can she not have killed? can we not have killed? can you not have killed? can they not have killed?	can I not have been killing? can you not have been killing? can she not have been killing? can we not have been killing? can you not have been killing? can they not have been killing?