English verb conjugation
COULD PASSIVIZE

Regular verb: passivize - passivized - passivized

Affirmation

Simple form	V-ing form
I could passivize you could passivize he could passivize we could passivize you could passivize they could passivize	I could be passivizing you could be passivizing he could be passivizing we could be passivizing you could be passivizing they could be passivizing
Perfect	V-ing perfect
I could have passivized you could have passivized he could have passivized we could have passivized you could have passivized they could have passivized	I could have been passivizing you could have been passivizing he could have been passivizing we could have been passivizing you could have been passivizing they could have been passivizing

Negation

Simple form	V-ing form
I couldn't passivize you couldn't passivize he couldn't passivize we couldn't passivize you couldn't passivize they couldn't passivize	I couldn't be passivizing you couldn't be passivizing he couldn't be passivizing we couldn't be passivizing you couldn't be passivizing they couldn't be passivizing
Perfect	V-ing perfect
I couldn't have passivized you couldn't have passivized he couldn't have passivized we couldn't have passivized you couldn't have passivized they couldn't have passivized	I couldn't have been passivizing you couldn't have been passivizing he couldn't have been passivizing we couldn't have been passivizing you couldn't have been passivizing they couldn't have been passivizing

Interrogative form

Simple form	V-ing form
could I passivize? could you passivize? could he passivize? could we passivize? could you passivize? could they passivize?	could I be passivizing? could you be passivizing? could he be passivizing? could we be passivizing? could you be passivizing? could they be passivizing?
Perfect	V-ing perfect
could I have passivized? could you have passivized? could he have passivized? could we have passivized? could you have passivized? could they have passivized?	could I have been passivizing? could you have been passivizing? could he have been passivizing? could we have been passivizing? could you have been passivizing? could they have been passivizing?

Interro-negative form

Simple form	V-ing form
couldn't I passivize? couldn't you passivize? couldn't he passivize? couldn't we passivize? couldn't you passivize? couldn't they passivize?	couldn't I be passivizing? couldn't you be passivizing? couldn't he be passivizing? couldn't we be passivizing? couldn't you be passivizing? couldn't they be passivizing?
Perfect	V-ing perfect
couldn't I have passivized? couldn't you have passivized? couldn't he have passivized? couldn't we have passivized? couldn't you have passivized? couldn't they have passivized?	couldn't I have been passivizing? couldn't you have been passivizing? couldn't he have been passivizing? couldn't we have been passivizing? couldn't you have been passivizing? couldn't they have been passivizing?