English verb conjugation
COULD FLITTER

Regular verb: flitter - flittered - flittered

Affirmation

Simple form	V-ing form
I could flitter you could flitter he could flitter we could flitter you could flitter they could flitter	I could be flittering you could be flittering he could be flittering we could be flittering you could be flittering they could be flittering
Perfect	V-ing perfect
I could have flittered you could have flittered he could have flittered we could have flittered you could have flittered they could have flittered	I could have been flittering you could have been flittering he could have been flittering we could have been flittering you could have been flittering they could have been flittering

Negation

Simple form	V-ing form
I could not flitter you could not flitter he could not flitter we could not flitter you could not flitter they could not flitter	I could not be flittering you could not be flittering he could not be flittering we could not be flittering you could not be flittering they could not be flittering
Perfect	V-ing perfect
I could not have flittered you could not have flittered he could not have flittered we could not have flittered you could not have flittered they could not have flittered	I could not have been flittering you could not have been flittering he could not have been flittering we could not have been flittering you could not have been flittering they could not have been flittering

Interrogative form

Simple form	V-ing form
could I flitter? could you flitter? could he flitter? could we flitter? could you flitter? could they flitter?	could I be flittering? could you be flittering? could he be flittering? could we be flittering? could you be flittering? could they be flittering?
Perfect	V-ing perfect
could I have flittered? could you have flittered? could he have flittered? could we have flittered? could you have flittered? could they have flittered?	could I have been flittering? could you have been flittering? could he have been flittering? could we have been flittering? could you have been flittering? could they have been flittering?

Interro-negative form

Simple form	V-ing form
could I not flitter? could you not flitter? could he not flitter? could we not flitter? could you not flitter? could they not flitter?	could I not be flittering? could you not be flittering? could he not be flittering? could we not be flittering? could you not be flittering? could they not be flittering?
Perfect	V-ing perfect
could I not have flittered? could you not have flittered? could he not have flittered? could we not have flittered? could you not have flittered? could they not have flittered?	could I not have been flittering? could you not have been flittering? could he not have been flittering? could we not have been flittering? could you not have been flittering? could they not have been flittering?