English verb conjugation
COULD SPONGE

Regular verb: sponge - sponged - sponged

Affirmation

Simple form	V-ing form
I could sponge you could sponge he could sponge we could sponge you could sponge they could sponge	I could be sponging you could be sponging he could be sponging we could be sponging you could be sponging they could be sponging
Perfect	V-ing perfect
I could have sponged you could have sponged he could have sponged we could have sponged you could have sponged they could have sponged	I could have been sponging you could have been sponging he could have been sponging we could have been sponging you could have been sponging they could have been sponging

Negation

Simple form	V-ing form
I couldn't sponge you couldn't sponge he couldn't sponge we couldn't sponge you couldn't sponge they couldn't sponge	I couldn't be sponging you couldn't be sponging he couldn't be sponging we couldn't be sponging you couldn't be sponging they couldn't be sponging
Perfect	V-ing perfect
I couldn't have sponged you couldn't have sponged he couldn't have sponged we couldn't have sponged you couldn't have sponged they couldn't have sponged	I couldn't have been sponging you couldn't have been sponging he couldn't have been sponging we couldn't have been sponging you couldn't have been sponging they couldn't have been sponging

Interrogative form

Simple form	V-ing form
could I sponge? could you sponge? could he sponge? could we sponge? could you sponge? could they sponge?	could I be sponging? could you be sponging? could he be sponging? could we be sponging? could you be sponging? could they be sponging?
Perfect	V-ing perfect
could I have sponged? could you have sponged? could he have sponged? could we have sponged? could you have sponged? could they have sponged?	could I have been sponging? could you have been sponging? could he have been sponging? could we have been sponging? could you have been sponging? could they have been sponging?

Interro-negative form

Simple form	V-ing form
couldn't I sponge? couldn't you sponge? couldn't he sponge? couldn't we sponge? couldn't you sponge? couldn't they sponge?	couldn't I be sponging? couldn't you be sponging? couldn't he be sponging? couldn't we be sponging? couldn't you be sponging? couldn't they be sponging?
Perfect	V-ing perfect
couldn't I have sponged? couldn't you have sponged? couldn't he have sponged? couldn't we have sponged? couldn't you have sponged? couldn't they have sponged?	couldn't I have been sponging? couldn't you have been sponging? couldn't he have been sponging? couldn't we have been sponging? couldn't you have been sponging? couldn't they have been sponging?