English verb conjugation
COULD RAVEN

Regular verb: raven - ravened - ravened

Affirmation

Simple form	V-ing form
I could raven you could raven he could raven we could raven you could raven they could raven	I could be ravening you could be ravening he could be ravening we could be ravening you could be ravening they could be ravening
Perfect	V-ing perfect
I could have ravened you could have ravened he could have ravened we could have ravened you could have ravened they could have ravened	I could have been ravening you could have been ravening he could have been ravening we could have been ravening you could have been ravening they could have been ravening

Negation

Simple form	V-ing form
I couldn't raven you couldn't raven he couldn't raven we couldn't raven you couldn't raven they couldn't raven	I couldn't be ravening you couldn't be ravening he couldn't be ravening we couldn't be ravening you couldn't be ravening they couldn't be ravening
Perfect	V-ing perfect
I couldn't have ravened you couldn't have ravened he couldn't have ravened we couldn't have ravened you couldn't have ravened they couldn't have ravened	I couldn't have been ravening you couldn't have been ravening he couldn't have been ravening we couldn't have been ravening you couldn't have been ravening they couldn't have been ravening

Interrogative form

Simple form	V-ing form
could I raven? could you raven? could he raven? could we raven? could you raven? could they raven?	could I be ravening? could you be ravening? could he be ravening? could we be ravening? could you be ravening? could they be ravening?
Perfect	V-ing perfect
could I have ravened? could you have ravened? could he have ravened? could we have ravened? could you have ravened? could they have ravened?	could I have been ravening? could you have been ravening? could he have been ravening? could we have been ravening? could you have been ravening? could they have been ravening?

Interro-negative form

Simple form	V-ing form
couldn't I raven? couldn't you raven? couldn't he raven? couldn't we raven? couldn't you raven? couldn't they raven?	couldn't I be ravening? couldn't you be ravening? couldn't he be ravening? couldn't we be ravening? couldn't you be ravening? couldn't they be ravening?
Perfect	V-ing perfect
couldn't I have ravened? couldn't you have ravened? couldn't he have ravened? couldn't we have ravened? couldn't you have ravened? couldn't they have ravened?	couldn't I have been ravening? couldn't you have been ravening? couldn't he have been ravening? couldn't we have been ravening? couldn't you have been ravening? couldn't they have been ravening?