English verb conjugation
COULD ULTRAFILTER

Regular verb: ultrafilter - ultrafiltered - ultrafiltered

Affirmation

Simple form	V-ing form
I could ultrafilter you could ultrafilter he could ultrafilter we could ultrafilter you could ultrafilter they could ultrafilter	I could be ultrafiltering you could be ultrafiltering he could be ultrafiltering we could be ultrafiltering you could be ultrafiltering they could be ultrafiltering
Perfect	V-ing perfect
I could have ultrafiltered you could have ultrafiltered he could have ultrafiltered we could have ultrafiltered you could have ultrafiltered they could have ultrafiltered	I could have been ultrafiltering you could have been ultrafiltering he could have been ultrafiltering we could have been ultrafiltering you could have been ultrafiltering they could have been ultrafiltering

Negation

Simple form	V-ing form
I could not ultrafilter you could not ultrafilter he could not ultrafilter we could not ultrafilter you could not ultrafilter they could not ultrafilter	I could not be ultrafiltering you could not be ultrafiltering he could not be ultrafiltering we could not be ultrafiltering you could not be ultrafiltering they could not be ultrafiltering
Perfect	V-ing perfect
I could not have ultrafiltered you could not have ultrafiltered he could not have ultrafiltered we could not have ultrafiltered you could not have ultrafiltered they could not have ultrafiltered	I could not have been ultrafiltering you could not have been ultrafiltering he could not have been ultrafiltering we could not have been ultrafiltering you could not have been ultrafiltering they could not have been ultrafiltering

Interrogative form

Simple form	V-ing form
could I ultrafilter? could you ultrafilter? could he ultrafilter? could we ultrafilter? could you ultrafilter? could they ultrafilter?	could I be ultrafiltering? could you be ultrafiltering? could he be ultrafiltering? could we be ultrafiltering? could you be ultrafiltering? could they be ultrafiltering?
Perfect	V-ing perfect
could I have ultrafiltered? could you have ultrafiltered? could he have ultrafiltered? could we have ultrafiltered? could you have ultrafiltered? could they have ultrafiltered?	could I have been ultrafiltering? could you have been ultrafiltering? could he have been ultrafiltering? could we have been ultrafiltering? could you have been ultrafiltering? could they have been ultrafiltering?

Interro-negative form

Simple form	V-ing form
could I not ultrafilter? could you not ultrafilter? could he not ultrafilter? could we not ultrafilter? could you not ultrafilter? could they not ultrafilter?	could I not be ultrafiltering? could you not be ultrafiltering? could he not be ultrafiltering? could we not be ultrafiltering? could you not be ultrafiltering? could they not be ultrafiltering?
Perfect	V-ing perfect
could I not have ultrafiltered? could you not have ultrafiltered? could he not have ultrafiltered? could we not have ultrafiltered? could you not have ultrafiltered? could they not have ultrafiltered?	could I not have been ultrafiltering? could you not have been ultrafiltering? could he not have been ultrafiltering? could we not have been ultrafiltering? could you not have been ultrafiltering? could they not have been ultrafiltering?