English verb conjugation
COULD FORMULIZE

Regular verb: formulize - formulized - formulized

Affirmation

Simple form	V-ing form
I could formulize you could formulize he could formulize we could formulize you could formulize they could formulize	I could be formulizing you could be formulizing he could be formulizing we could be formulizing you could be formulizing they could be formulizing
Perfect	V-ing perfect
I could have formulized you could have formulized he could have formulized we could have formulized you could have formulized they could have formulized	I could have been formulizing you could have been formulizing he could have been formulizing we could have been formulizing you could have been formulizing they could have been formulizing

Negation

Simple form	V-ing form
I couldn't formulize you couldn't formulize he couldn't formulize we couldn't formulize you couldn't formulize they couldn't formulize	I couldn't be formulizing you couldn't be formulizing he couldn't be formulizing we couldn't be formulizing you couldn't be formulizing they couldn't be formulizing
Perfect	V-ing perfect
I couldn't have formulized you couldn't have formulized he couldn't have formulized we couldn't have formulized you couldn't have formulized they couldn't have formulized	I couldn't have been formulizing you couldn't have been formulizing he couldn't have been formulizing we couldn't have been formulizing you couldn't have been formulizing they couldn't have been formulizing

Interrogative form

Simple form	V-ing form
could I formulize? could you formulize? could he formulize? could we formulize? could you formulize? could they formulize?	could I be formulizing? could you be formulizing? could he be formulizing? could we be formulizing? could you be formulizing? could they be formulizing?
Perfect	V-ing perfect
could I have formulized? could you have formulized? could he have formulized? could we have formulized? could you have formulized? could they have formulized?	could I have been formulizing? could you have been formulizing? could he have been formulizing? could we have been formulizing? could you have been formulizing? could they have been formulizing?

Interro-negative form

Simple form	V-ing form
couldn't I formulize? couldn't you formulize? couldn't he formulize? couldn't we formulize? couldn't you formulize? couldn't they formulize?	couldn't I be formulizing? couldn't you be formulizing? couldn't he be formulizing? couldn't we be formulizing? couldn't you be formulizing? couldn't they be formulizing?
Perfect	V-ing perfect
couldn't I have formulized? couldn't you have formulized? couldn't he have formulized? couldn't we have formulized? couldn't you have formulized? couldn't they have formulized?	couldn't I have been formulizing? couldn't you have been formulizing? couldn't he have been formulizing? couldn't we have been formulizing? couldn't you have been formulizing? couldn't they have been formulizing?