English verb conjugation
COULD IMPOVERISH

Regular verb: impoverish - impoverished - impoverished

Affirmation

Simple form	V-ing form
I could impoverish you could impoverish he could impoverish we could impoverish you could impoverish they could impoverish	I could be impoverishing you could be impoverishing he could be impoverishing we could be impoverishing you could be impoverishing they could be impoverishing
Perfect	V-ing perfect
I could have impoverished you could have impoverished he could have impoverished we could have impoverished you could have impoverished they could have impoverished	I could have been impoverishing you could have been impoverishing he could have been impoverishing we could have been impoverishing you could have been impoverishing they could have been impoverishing

Negation

Simple form	V-ing form
I couldn't impoverish you couldn't impoverish he couldn't impoverish we couldn't impoverish you couldn't impoverish they couldn't impoverish	I couldn't be impoverishing you couldn't be impoverishing he couldn't be impoverishing we couldn't be impoverishing you couldn't be impoverishing they couldn't be impoverishing
Perfect	V-ing perfect
I couldn't have impoverished you couldn't have impoverished he couldn't have impoverished we couldn't have impoverished you couldn't have impoverished they couldn't have impoverished	I couldn't have been impoverishing you couldn't have been impoverishing he couldn't have been impoverishing we couldn't have been impoverishing you couldn't have been impoverishing they couldn't have been impoverishing

Interrogative form

Simple form	V-ing form
could I impoverish? could you impoverish? could he impoverish? could we impoverish? could you impoverish? could they impoverish?	could I be impoverishing? could you be impoverishing? could he be impoverishing? could we be impoverishing? could you be impoverishing? could they be impoverishing?
Perfect	V-ing perfect
could I have impoverished? could you have impoverished? could he have impoverished? could we have impoverished? could you have impoverished? could they have impoverished?	could I have been impoverishing? could you have been impoverishing? could he have been impoverishing? could we have been impoverishing? could you have been impoverishing? could they have been impoverishing?

Interro-negative form

Simple form	V-ing form
couldn't I impoverish? couldn't you impoverish? couldn't he impoverish? couldn't we impoverish? couldn't you impoverish? couldn't they impoverish?	couldn't I be impoverishing? couldn't you be impoverishing? couldn't he be impoverishing? couldn't we be impoverishing? couldn't you be impoverishing? couldn't they be impoverishing?
Perfect	V-ing perfect
couldn't I have impoverished? couldn't you have impoverished? couldn't he have impoverished? couldn't we have impoverished? couldn't you have impoverished? couldn't they have impoverished?	couldn't I have been impoverishing? couldn't you have been impoverishing? couldn't he have been impoverishing? couldn't we have been impoverishing? couldn't you have been impoverishing? couldn't they have been impoverishing?