English verb conjugation
COULD VANQUISH

Regular verb: vanquish - vanquished - vanquished

Affirmation

Simple form	V-ing form
I could vanquish you could vanquish she could vanquish we could vanquish you could vanquish they could vanquish	I could be vanquishing you could be vanquishing she could be vanquishing we could be vanquishing you could be vanquishing they could be vanquishing
Perfect	V-ing perfect
I could have vanquished you could have vanquished she could have vanquished we could have vanquished you could have vanquished they could have vanquished	I could have been vanquishing you could have been vanquishing she could have been vanquishing we could have been vanquishing you could have been vanquishing they could have been vanquishing

Negation

Simple form	V-ing form
I could not vanquish you could not vanquish she could not vanquish we could not vanquish you could not vanquish they could not vanquish	I could not be vanquishing you could not be vanquishing she could not be vanquishing we could not be vanquishing you could not be vanquishing they could not be vanquishing
Perfect	V-ing perfect
I could not have vanquished you could not have vanquished she could not have vanquished we could not have vanquished you could not have vanquished they could not have vanquished	I could not have been vanquishing you could not have been vanquishing she could not have been vanquishing we could not have been vanquishing you could not have been vanquishing they could not have been vanquishing

Interrogative form

Simple form	V-ing form
could I vanquish? could you vanquish? could she vanquish? could we vanquish? could you vanquish? could they vanquish?	could I be vanquishing? could you be vanquishing? could she be vanquishing? could we be vanquishing? could you be vanquishing? could they be vanquishing?
Perfect	V-ing perfect
could I have vanquished? could you have vanquished? could she have vanquished? could we have vanquished? could you have vanquished? could they have vanquished?	could I have been vanquishing? could you have been vanquishing? could she have been vanquishing? could we have been vanquishing? could you have been vanquishing? could they have been vanquishing?

Interro-negative form

Simple form	V-ing form
could I not vanquish? could you not vanquish? could she not vanquish? could we not vanquish? could you not vanquish? could they not vanquish?	could I not be vanquishing? could you not be vanquishing? could she not be vanquishing? could we not be vanquishing? could you not be vanquishing? could they not be vanquishing?
Perfect	V-ing perfect
could I not have vanquished? could you not have vanquished? could she not have vanquished? could we not have vanquished? could you not have vanquished? could they not have vanquished?	could I not have been vanquishing? could you not have been vanquishing? could she not have been vanquishing? could we not have been vanquishing? could you not have been vanquishing? could they not have been vanquishing?