English verb conjugation
COULD PHOSPHORESCE

Regular verb: phosphoresce - phosphoresced - phosphoresced

Affirmation

Simple form	V-ing form
I could phosphoresce you could phosphoresce he could phosphoresce we could phosphoresce you could phosphoresce they could phosphoresce	I could be phosphorescing you could be phosphorescing he could be phosphorescing we could be phosphorescing you could be phosphorescing they could be phosphorescing
Perfect	V-ing perfect
I could have phosphoresced you could have phosphoresced he could have phosphoresced we could have phosphoresced you could have phosphoresced they could have phosphoresced	I could have been phosphorescing you could have been phosphorescing he could have been phosphorescing we could have been phosphorescing you could have been phosphorescing they could have been phosphorescing

Negation

Simple form	V-ing form
I could not phosphoresce you could not phosphoresce he could not phosphoresce we could not phosphoresce you could not phosphoresce they could not phosphoresce	I could not be phosphorescing you could not be phosphorescing he could not be phosphorescing we could not be phosphorescing you could not be phosphorescing they could not be phosphorescing
Perfect	V-ing perfect
I could not have phosphoresced you could not have phosphoresced he could not have phosphoresced we could not have phosphoresced you could not have phosphoresced they could not have phosphoresced	I could not have been phosphorescing you could not have been phosphorescing he could not have been phosphorescing we could not have been phosphorescing you could not have been phosphorescing they could not have been phosphorescing

Interrogative form

Simple form	V-ing form
could I phosphoresce? could you phosphoresce? could he phosphoresce? could we phosphoresce? could you phosphoresce? could they phosphoresce?	could I be phosphorescing? could you be phosphorescing? could he be phosphorescing? could we be phosphorescing? could you be phosphorescing? could they be phosphorescing?
Perfect	V-ing perfect
could I have phosphoresced? could you have phosphoresced? could he have phosphoresced? could we have phosphoresced? could you have phosphoresced? could they have phosphoresced?	could I have been phosphorescing? could you have been phosphorescing? could he have been phosphorescing? could we have been phosphorescing? could you have been phosphorescing? could they have been phosphorescing?

Interro-negative form

Simple form	V-ing form
could I not phosphoresce? could you not phosphoresce? could he not phosphoresce? could we not phosphoresce? could you not phosphoresce? could they not phosphoresce?	could I not be phosphorescing? could you not be phosphorescing? could he not be phosphorescing? could we not be phosphorescing? could you not be phosphorescing? could they not be phosphorescing?
Perfect	V-ing perfect
could I not have phosphoresced? could you not have phosphoresced? could he not have phosphoresced? could we not have phosphoresced? could you not have phosphoresced? could they not have phosphoresced?	could I not have been phosphorescing? could you not have been phosphorescing? could he not have been phosphorescing? could we not have been phosphorescing? could you not have been phosphorescing? could they not have been phosphorescing?