English verb conjugation
COULD PUNISH

Regular verb: punish - punished - punished

Affirmation

Simple form	V-ing form
I could punish you could punish he could punish we could punish you could punish they could punish	I could be punishing you could be punishing he could be punishing we could be punishing you could be punishing they could be punishing
Perfect	V-ing perfect
I could have punished you could have punished he could have punished we could have punished you could have punished they could have punished	I could have been punishing you could have been punishing he could have been punishing we could have been punishing you could have been punishing they could have been punishing

Negation

Simple form	V-ing form
I couldn't punish you couldn't punish he couldn't punish we couldn't punish you couldn't punish they couldn't punish	I couldn't be punishing you couldn't be punishing he couldn't be punishing we couldn't be punishing you couldn't be punishing they couldn't be punishing
Perfect	V-ing perfect
I couldn't have punished you couldn't have punished he couldn't have punished we couldn't have punished you couldn't have punished they couldn't have punished	I couldn't have been punishing you couldn't have been punishing he couldn't have been punishing we couldn't have been punishing you couldn't have been punishing they couldn't have been punishing

Interrogative form

Simple form	V-ing form
could I punish? could you punish? could he punish? could we punish? could you punish? could they punish?	could I be punishing? could you be punishing? could he be punishing? could we be punishing? could you be punishing? could they be punishing?
Perfect	V-ing perfect
could I have punished? could you have punished? could he have punished? could we have punished? could you have punished? could they have punished?	could I have been punishing? could you have been punishing? could he have been punishing? could we have been punishing? could you have been punishing? could they have been punishing?

Interro-negative form

Simple form	V-ing form
couldn't I punish? couldn't you punish? couldn't he punish? couldn't we punish? couldn't you punish? couldn't they punish?	couldn't I be punishing? couldn't you be punishing? couldn't he be punishing? couldn't we be punishing? couldn't you be punishing? couldn't they be punishing?
Perfect	V-ing perfect
couldn't I have punished? couldn't you have punished? couldn't he have punished? couldn't we have punished? couldn't you have punished? couldn't they have punished?	couldn't I have been punishing? couldn't you have been punishing? couldn't he have been punishing? couldn't we have been punishing? couldn't you have been punishing? couldn't they have been punishing?