English verb conjugation
COULD SYMMETRIZE

Regular verb: symmetrize - symmetrized - symmetrized

Affirmation

Simple form	V-ing form
I could symmetrize you could symmetrize he could symmetrize we could symmetrize you could symmetrize they could symmetrize	I could be symmetrizing you could be symmetrizing he could be symmetrizing we could be symmetrizing you could be symmetrizing they could be symmetrizing
Perfect	V-ing perfect
I could have symmetrized you could have symmetrized he could have symmetrized we could have symmetrized you could have symmetrized they could have symmetrized	I could have been symmetrizing you could have been symmetrizing he could have been symmetrizing we could have been symmetrizing you could have been symmetrizing they could have been symmetrizing

Negation

Simple form	V-ing form
I could not symmetrize you could not symmetrize he could not symmetrize we could not symmetrize you could not symmetrize they could not symmetrize	I could not be symmetrizing you could not be symmetrizing he could not be symmetrizing we could not be symmetrizing you could not be symmetrizing they could not be symmetrizing
Perfect	V-ing perfect
I could not have symmetrized you could not have symmetrized he could not have symmetrized we could not have symmetrized you could not have symmetrized they could not have symmetrized	I could not have been symmetrizing you could not have been symmetrizing he could not have been symmetrizing we could not have been symmetrizing you could not have been symmetrizing they could not have been symmetrizing

Interrogative form

Simple form	V-ing form
could I symmetrize? could you symmetrize? could he symmetrize? could we symmetrize? could you symmetrize? could they symmetrize?	could I be symmetrizing? could you be symmetrizing? could he be symmetrizing? could we be symmetrizing? could you be symmetrizing? could they be symmetrizing?
Perfect	V-ing perfect
could I have symmetrized? could you have symmetrized? could he have symmetrized? could we have symmetrized? could you have symmetrized? could they have symmetrized?	could I have been symmetrizing? could you have been symmetrizing? could he have been symmetrizing? could we have been symmetrizing? could you have been symmetrizing? could they have been symmetrizing?

Interro-negative form

Simple form	V-ing form
could I not symmetrize? could you not symmetrize? could he not symmetrize? could we not symmetrize? could you not symmetrize? could they not symmetrize?	could I not be symmetrizing? could you not be symmetrizing? could he not be symmetrizing? could we not be symmetrizing? could you not be symmetrizing? could they not be symmetrizing?
Perfect	V-ing perfect
could I not have symmetrized? could you not have symmetrized? could he not have symmetrized? could we not have symmetrized? could you not have symmetrized? could they not have symmetrized?	could I not have been symmetrizing? could you not have been symmetrizing? could he not have been symmetrizing? could we not have been symmetrizing? could you not have been symmetrizing? could they not have been symmetrizing?