English verb conjugation
COULD DECARBURIZE

Regular verb: decarburize - decarburized - decarburized

Affirmation

Simple form	V-ing form
I could decarburize you could decarburize she could decarburize we could decarburize you could decarburize they could decarburize	I could be decarburizing you could be decarburizing she could be decarburizing we could be decarburizing you could be decarburizing they could be decarburizing
Perfect	V-ing perfect
I could have decarburized you could have decarburized she could have decarburized we could have decarburized you could have decarburized they could have decarburized	I could have been decarburizing you could have been decarburizing she could have been decarburizing we could have been decarburizing you could have been decarburizing they could have been decarburizing

Negation

Simple form	V-ing form
I couldn't decarburize you couldn't decarburize she couldn't decarburize we couldn't decarburize you couldn't decarburize they couldn't decarburize	I couldn't be decarburizing you couldn't be decarburizing she couldn't be decarburizing we couldn't be decarburizing you couldn't be decarburizing they couldn't be decarburizing
Perfect	V-ing perfect
I couldn't have decarburized you couldn't have decarburized she couldn't have decarburized we couldn't have decarburized you couldn't have decarburized they couldn't have decarburized	I couldn't have been decarburizing you couldn't have been decarburizing she couldn't have been decarburizing we couldn't have been decarburizing you couldn't have been decarburizing they couldn't have been decarburizing

Interrogative form

Simple form	V-ing form
could I decarburize? could you decarburize? could she decarburize? could we decarburize? could you decarburize? could they decarburize?	could I be decarburizing? could you be decarburizing? could she be decarburizing? could we be decarburizing? could you be decarburizing? could they be decarburizing?
Perfect	V-ing perfect
could I have decarburized? could you have decarburized? could she have decarburized? could we have decarburized? could you have decarburized? could they have decarburized?	could I have been decarburizing? could you have been decarburizing? could she have been decarburizing? could we have been decarburizing? could you have been decarburizing? could they have been decarburizing?

Interro-negative form

Simple form	V-ing form
couldn't I decarburize? couldn't you decarburize? couldn't she decarburize? couldn't we decarburize? couldn't you decarburize? couldn't they decarburize?	couldn't I be decarburizing? couldn't you be decarburizing? couldn't she be decarburizing? couldn't we be decarburizing? couldn't you be decarburizing? couldn't they be decarburizing?
Perfect	V-ing perfect
couldn't I have decarburized? couldn't you have decarburized? couldn't she have decarburized? couldn't we have decarburized? couldn't you have decarburized? couldn't they have decarburized?	couldn't I have been decarburizing? couldn't you have been decarburizing? couldn't she have been decarburizing? couldn't we have been decarburizing? couldn't you have been decarburizing? couldn't they have been decarburizing?