English verb conjugation
COULD PAN

Regular verb: pan - panned - panned

Affirmation

Simple form	V-ing form
I could pan you could pan he could pan we could pan you could pan they could pan	I could be panning you could be panning he could be panning we could be panning you could be panning they could be panning
Perfect	V-ing perfect
I could have panned you could have panned he could have panned we could have panned you could have panned they could have panned	I could have been panning you could have been panning he could have been panning we could have been panning you could have been panning they could have been panning

Negation

Simple form	V-ing form
I couldn't pan you couldn't pan he couldn't pan we couldn't pan you couldn't pan they couldn't pan	I couldn't be panning you couldn't be panning he couldn't be panning we couldn't be panning you couldn't be panning they couldn't be panning
Perfect	V-ing perfect
I couldn't have panned you couldn't have panned he couldn't have panned we couldn't have panned you couldn't have panned they couldn't have panned	I couldn't have been panning you couldn't have been panning he couldn't have been panning we couldn't have been panning you couldn't have been panning they couldn't have been panning

Interrogative form

Simple form	V-ing form
could I pan? could you pan? could he pan? could we pan? could you pan? could they pan?	could I be panning? could you be panning? could he be panning? could we be panning? could you be panning? could they be panning?
Perfect	V-ing perfect
could I have panned? could you have panned? could he have panned? could we have panned? could you have panned? could they have panned?	could I have been panning? could you have been panning? could he have been panning? could we have been panning? could you have been panning? could they have been panning?

Interro-negative form

Simple form	V-ing form
couldn't I pan? couldn't you pan? couldn't he pan? couldn't we pan? couldn't you pan? couldn't they pan?	couldn't I be panning? couldn't you be panning? couldn't he be panning? couldn't we be panning? couldn't you be panning? couldn't they be panning?
Perfect	V-ing perfect
couldn't I have panned? couldn't you have panned? couldn't he have panned? couldn't we have panned? couldn't you have panned? couldn't they have panned?	couldn't I have been panning? couldn't you have been panning? couldn't he have been panning? couldn't we have been panning? couldn't you have been panning? couldn't they have been panning?