I can kill you can kill he can kill we can kill you can kill they can kill
V-ing form
I can be killing you can be killing he can be killing we can be killing you can be killing they can be killing
Perfect
I can have killed you can have killed he can have killed we can have killed you can have killed they can have killed
V-ing perfect
I can have been killing you can have been killing he can have been killing we can have been killing you can have been killing they can have been killing
Negation
Simple form
I can't kill you can't kill he can't kill we can't kill you can't kill they can't kill
V-ing form
I can't be killing you can't be killing he can't be killing we can't be killing you can't be killing they can't be killing
Perfect
I can't have killed you can't have killed he can't have killed we can't have killed you can't have killed they can't have killed
V-ing perfect
I can't have been killing you can't have been killing he can't have been killing we can't have been killing you can't have been killing they can't have been killing
Interrogative form
Simple form
can I kill? can you kill? can he kill? can we kill? can you kill? can they kill?
V-ing form
can I be killing? can you be killing? can he be killing? can we be killing? can you be killing? can they be killing?
Perfect
can I have killed? can you have killed? can he have killed? can we have killed? can you have killed? can they have killed?
V-ing perfect
can I have been killing? can you have been killing? can he have been killing? can we have been killing? can you have been killing? can they have been killing?
Interro-negative form
Simple form
can't I kill? can't you kill? can't he kill? can't we kill? can't you kill? can't they kill?
V-ing form
can't I be killing? can't you be killing? can't he be killing? can't we be killing? can't you be killing? can't they be killing?
Perfect
can't I have killed? can't you have killed? can't he have killed? can't we have killed? can't you have killed? can't they have killed?
V-ing perfect
can't I have been killing? can't you have been killing? can't he have been killing? can't we have been killing? can't you have been killing? can't they have been killing?