English verb conjugation
COULD OXIDIZE

Regular verb: oxidize - oxidized - oxidized

Affirmation

Simple form	V-ing form
I could oxidize you could oxidize he could oxidize we could oxidize you could oxidize they could oxidize	I could be oxidizing you could be oxidizing he could be oxidizing we could be oxidizing you could be oxidizing they could be oxidizing
Perfect	V-ing perfect
I could have oxidized you could have oxidized he could have oxidized we could have oxidized you could have oxidized they could have oxidized	I could have been oxidizing you could have been oxidizing he could have been oxidizing we could have been oxidizing you could have been oxidizing they could have been oxidizing

Negation

Simple form	V-ing form
I couldn't oxidize you couldn't oxidize he couldn't oxidize we couldn't oxidize you couldn't oxidize they couldn't oxidize	I couldn't be oxidizing you couldn't be oxidizing he couldn't be oxidizing we couldn't be oxidizing you couldn't be oxidizing they couldn't be oxidizing
Perfect	V-ing perfect
I couldn't have oxidized you couldn't have oxidized he couldn't have oxidized we couldn't have oxidized you couldn't have oxidized they couldn't have oxidized	I couldn't have been oxidizing you couldn't have been oxidizing he couldn't have been oxidizing we couldn't have been oxidizing you couldn't have been oxidizing they couldn't have been oxidizing

Interrogative form

Simple form	V-ing form
could I oxidize? could you oxidize? could he oxidize? could we oxidize? could you oxidize? could they oxidize?	could I be oxidizing? could you be oxidizing? could he be oxidizing? could we be oxidizing? could you be oxidizing? could they be oxidizing?
Perfect	V-ing perfect
could I have oxidized? could you have oxidized? could he have oxidized? could we have oxidized? could you have oxidized? could they have oxidized?	could I have been oxidizing? could you have been oxidizing? could he have been oxidizing? could we have been oxidizing? could you have been oxidizing? could they have been oxidizing?

Interro-negative form

Simple form	V-ing form
couldn't I oxidize? couldn't you oxidize? couldn't he oxidize? couldn't we oxidize? couldn't you oxidize? couldn't they oxidize?	couldn't I be oxidizing? couldn't you be oxidizing? couldn't he be oxidizing? couldn't we be oxidizing? couldn't you be oxidizing? couldn't they be oxidizing?
Perfect	V-ing perfect
couldn't I have oxidized? couldn't you have oxidized? couldn't he have oxidized? couldn't we have oxidized? couldn't you have oxidized? couldn't they have oxidized?	couldn't I have been oxidizing? couldn't you have been oxidizing? couldn't he have been oxidizing? couldn't we have been oxidizing? couldn't you have been oxidizing? couldn't they have been oxidizing?