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 couldn't flitter you couldn't flitter he couldn't flitter we couldn't flitter you couldn't flitter they couldn't flitter	I couldn't be flittering you couldn't be flittering he couldn't be flittering we couldn't be flittering you couldn't be flittering they couldn't be flittering
Perfect	V-ing perfect
I couldn't have flittered you couldn't have flittered he couldn't have flittered we couldn't have flittered you couldn't have flittered they couldn't have flittered	I couldn't have been flittering you couldn't have been flittering he couldn't have been flittering we couldn't have been flittering you couldn't have been flittering they couldn't 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
couldn't I flitter? couldn't you flitter? couldn't he flitter? couldn't we flitter? couldn't you flitter? couldn't they flitter?	couldn't I be flittering? couldn't you be flittering? couldn't he be flittering? couldn't we be flittering? couldn't you be flittering? couldn't they be flittering?
Perfect	V-ing perfect
couldn't I have flittered? couldn't you have flittered? couldn't he have flittered? couldn't we have flittered? couldn't you have flittered? couldn't they have flittered?	couldn't I have been flittering? couldn't you have been flittering? couldn't he have been flittering? couldn't we have been flittering? couldn't you have been flittering? couldn't they have been flittering?