English verb conjugation
COULD PITH

Regular verb: pith - pithed - pithed

Affirmation

Simple form	V-ing form
I could pith you could pith he could pith we could pith you could pith they could pith	I could be pithing you could be pithing he could be pithing we could be pithing you could be pithing they could be pithing
Perfect	V-ing perfect
I could have pithed you could have pithed he could have pithed we could have pithed you could have pithed they could have pithed	I could have been pithing you could have been pithing he could have been pithing we could have been pithing you could have been pithing they could have been pithing

Negation

Simple form	V-ing form
I could not pith you could not pith he could not pith we could not pith you could not pith they could not pith	I could not be pithing you could not be pithing he could not be pithing we could not be pithing you could not be pithing they could not be pithing
Perfect	V-ing perfect
I could not have pithed you could not have pithed he could not have pithed we could not have pithed you could not have pithed they could not have pithed	I could not have been pithing you could not have been pithing he could not have been pithing we could not have been pithing you could not have been pithing they could not have been pithing

Interrogative form

Simple form	V-ing form
could I pith? could you pith? could he pith? could we pith? could you pith? could they pith?	could I be pithing? could you be pithing? could he be pithing? could we be pithing? could you be pithing? could they be pithing?
Perfect	V-ing perfect
could I have pithed? could you have pithed? could he have pithed? could we have pithed? could you have pithed? could they have pithed?	could I have been pithing? could you have been pithing? could he have been pithing? could we have been pithing? could you have been pithing? could they have been pithing?

Interro-negative form

Simple form	V-ing form
could I not pith? could you not pith? could he not pith? could we not pith? could you not pith? could they not pith?	could I not be pithing? could you not be pithing? could he not be pithing? could we not be pithing? could you not be pithing? could they not be pithing?
Perfect	V-ing perfect
could I not have pithed? could you not have pithed? could he not have pithed? could we not have pithed? could you not have pithed? could they not have pithed?	could I not have been pithing? could you not have been pithing? could he not have been pithing? could we not have been pithing? could you not have been pithing? could they not have been pithing?