English verb conjugation
COULD FITTER

Regular verb: fitter - fittered - fittered

Affirmation

Simple form	V-ing form
I could fitter you could fitter he could fitter we could fitter you could fitter they could fitter	I could be fittering you could be fittering he could be fittering we could be fittering you could be fittering they could be fittering
Perfect	V-ing perfect
I could have fittered you could have fittered he could have fittered we could have fittered you could have fittered they could have fittered	I could have been fittering you could have been fittering he could have been fittering we could have been fittering you could have been fittering they could have been fittering

Negation

Simple form	V-ing form
I couldn't fitter you couldn't fitter he couldn't fitter we couldn't fitter you couldn't fitter they couldn't fitter	I couldn't be fittering you couldn't be fittering he couldn't be fittering we couldn't be fittering you couldn't be fittering they couldn't be fittering
Perfect	V-ing perfect
I couldn't have fittered you couldn't have fittered he couldn't have fittered we couldn't have fittered you couldn't have fittered they couldn't have fittered	I couldn't have been fittering you couldn't have been fittering he couldn't have been fittering we couldn't have been fittering you couldn't have been fittering they couldn't have been fittering

Interrogative form

Simple form	V-ing form
could I fitter? could you fitter? could he fitter? could we fitter? could you fitter? could they fitter?	could I be fittering? could you be fittering? could he be fittering? could we be fittering? could you be fittering? could they be fittering?
Perfect	V-ing perfect
could I have fittered? could you have fittered? could he have fittered? could we have fittered? could you have fittered? could they have fittered?	could I have been fittering? could you have been fittering? could he have been fittering? could we have been fittering? could you have been fittering? could they have been fittering?

Interro-negative form

Simple form	V-ing form
couldn't I fitter? couldn't you fitter? couldn't he fitter? couldn't we fitter? couldn't you fitter? couldn't they fitter?	couldn't I be fittering? couldn't you be fittering? couldn't he be fittering? couldn't we be fittering? couldn't you be fittering? couldn't they be fittering?
Perfect	V-ing perfect
couldn't I have fittered? couldn't you have fittered? couldn't he have fittered? couldn't we have fittered? couldn't you have fittered? couldn't they have fittered?	couldn't I have been fittering? couldn't you have been fittering? couldn't he have been fittering? couldn't we have been fittering? couldn't you have been fittering? couldn't they have been fittering?