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 couldn't pith you couldn't pith he couldn't pith we couldn't pith you couldn't pith they couldn't pith	I couldn't be pithing you couldn't be pithing he couldn't be pithing we couldn't be pithing you couldn't be pithing they couldn't be pithing
Perfect	V-ing perfect
I couldn't have pithed you couldn't have pithed he couldn't have pithed we couldn't have pithed you couldn't have pithed they couldn't have pithed	I couldn't have been pithing you couldn't have been pithing he couldn't have been pithing we couldn't have been pithing you couldn't have been pithing they couldn't 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
couldn't I pith? couldn't you pith? couldn't he pith? couldn't we pith? couldn't you pith? couldn't they pith?	couldn't I be pithing? couldn't you be pithing? couldn't he be pithing? couldn't we be pithing? couldn't you be pithing? couldn't they be pithing?
Perfect	V-ing perfect
couldn't I have pithed? couldn't you have pithed? couldn't he have pithed? couldn't we have pithed? couldn't you have pithed? couldn't they have pithed?	couldn't I have been pithing? couldn't you have been pithing? couldn't he have been pithing? couldn't we have been pithing? couldn't you have been pithing? couldn't they have been pithing?