English verb conjugation
COULD FACTORIZE

Regular verb: factorize - factorized - factorized

Affirmation

Simple form	V-ing form
I could factorize you could factorize she could factorize we could factorize you could factorize they could factorize	I could be factorizing you could be factorizing she could be factorizing we could be factorizing you could be factorizing they could be factorizing
Perfect	V-ing perfect
I could have factorized you could have factorized she could have factorized we could have factorized you could have factorized they could have factorized	I could have been factorizing you could have been factorizing she could have been factorizing we could have been factorizing you could have been factorizing they could have been factorizing

Negation

Simple form	V-ing form
I couldn't factorize you couldn't factorize she couldn't factorize we couldn't factorize you couldn't factorize they couldn't factorize	I couldn't be factorizing you couldn't be factorizing she couldn't be factorizing we couldn't be factorizing you couldn't be factorizing they couldn't be factorizing
Perfect	V-ing perfect
I couldn't have factorized you couldn't have factorized she couldn't have factorized we couldn't have factorized you couldn't have factorized they couldn't have factorized	I couldn't have been factorizing you couldn't have been factorizing she couldn't have been factorizing we couldn't have been factorizing you couldn't have been factorizing they couldn't have been factorizing

Interrogative form

Simple form	V-ing form
could I factorize? could you factorize? could she factorize? could we factorize? could you factorize? could they factorize?	could I be factorizing? could you be factorizing? could she be factorizing? could we be factorizing? could you be factorizing? could they be factorizing?
Perfect	V-ing perfect
could I have factorized? could you have factorized? could she have factorized? could we have factorized? could you have factorized? could they have factorized?	could I have been factorizing? could you have been factorizing? could she have been factorizing? could we have been factorizing? could you have been factorizing? could they have been factorizing?

Interro-negative form

Simple form	V-ing form
couldn't I factorize? couldn't you factorize? couldn't she factorize? couldn't we factorize? couldn't you factorize? couldn't they factorize?	couldn't I be factorizing? couldn't you be factorizing? couldn't she be factorizing? couldn't we be factorizing? couldn't you be factorizing? couldn't they be factorizing?
Perfect	V-ing perfect
couldn't I have factorized? couldn't you have factorized? couldn't she have factorized? couldn't we have factorized? couldn't you have factorized? couldn't they have factorized?	couldn't I have been factorizing? couldn't you have been factorizing? couldn't she have been factorizing? couldn't we have been factorizing? couldn't you have been factorizing? couldn't they have been factorizing?