English verb conjugation
COULD DESULFERIZE

Regular verb: desulferize - desulferized - desulferized

Affirmation

Simple form	V-ing form
I could desulferize you could desulferize she could desulferize we could desulferize you could desulferize they could desulferize	I could be desulferizing you could be desulferizing she could be desulferizing we could be desulferizing you could be desulferizing they could be desulferizing
Perfect	V-ing perfect
I could have desulferized you could have desulferized she could have desulferized we could have desulferized you could have desulferized they could have desulferized	I could have been desulferizing you could have been desulferizing she could have been desulferizing we could have been desulferizing you could have been desulferizing they could have been desulferizing

Negation

Simple form	V-ing form
I couldn't desulferize you couldn't desulferize she couldn't desulferize we couldn't desulferize you couldn't desulferize they couldn't desulferize	I couldn't be desulferizing you couldn't be desulferizing she couldn't be desulferizing we couldn't be desulferizing you couldn't be desulferizing they couldn't be desulferizing
Perfect	V-ing perfect
I couldn't have desulferized you couldn't have desulferized she couldn't have desulferized we couldn't have desulferized you couldn't have desulferized they couldn't have desulferized	I couldn't have been desulferizing you couldn't have been desulferizing she couldn't have been desulferizing we couldn't have been desulferizing you couldn't have been desulferizing they couldn't have been desulferizing

Interrogative form

Simple form	V-ing form
could I desulferize? could you desulferize? could she desulferize? could we desulferize? could you desulferize? could they desulferize?	could I be desulferizing? could you be desulferizing? could she be desulferizing? could we be desulferizing? could you be desulferizing? could they be desulferizing?
Perfect	V-ing perfect
could I have desulferized? could you have desulferized? could she have desulferized? could we have desulferized? could you have desulferized? could they have desulferized?	could I have been desulferizing? could you have been desulferizing? could she have been desulferizing? could we have been desulferizing? could you have been desulferizing? could they have been desulferizing?

Interro-negative form

Simple form	V-ing form
couldn't I desulferize? couldn't you desulferize? couldn't she desulferize? couldn't we desulferize? couldn't you desulferize? couldn't they desulferize?	couldn't I be desulferizing? couldn't you be desulferizing? couldn't she be desulferizing? couldn't we be desulferizing? couldn't you be desulferizing? couldn't they be desulferizing?
Perfect	V-ing perfect
couldn't I have desulferized? couldn't you have desulferized? couldn't she have desulferized? couldn't we have desulferized? couldn't you have desulferized? couldn't they have desulferized?	couldn't I have been desulferizing? couldn't you have been desulferizing? couldn't she have been desulferizing? couldn't we have been desulferizing? couldn't you have been desulferizing? couldn't they have been desulferizing?