English verb conjugation
COULD CORBEL

Regular verb: corbel - corbeled - corbeled

Affirmation

Simple form	V-ing form
I could corbel you could corbel he could corbel we could corbel you could corbel they could corbel	I could be corbeling you could be corbeling he could be corbeling we could be corbeling you could be corbeling they could be corbeling
Perfect	V-ing perfect
I could have corbeled you could have corbeled he could have corbeled we could have corbeled you could have corbeled they could have corbeled	I could have been corbeling you could have been corbeling he could have been corbeling we could have been corbeling you could have been corbeling they could have been corbeling

Negation

Simple form	V-ing form
I couldn't corbel you couldn't corbel he couldn't corbel we couldn't corbel you couldn't corbel they couldn't corbel	I couldn't be corbeling you couldn't be corbeling he couldn't be corbeling we couldn't be corbeling you couldn't be corbeling they couldn't be corbeling
Perfect	V-ing perfect
I couldn't have corbeled you couldn't have corbeled he couldn't have corbeled we couldn't have corbeled you couldn't have corbeled they couldn't have corbeled	I couldn't have been corbeling you couldn't have been corbeling he couldn't have been corbeling we couldn't have been corbeling you couldn't have been corbeling they couldn't have been corbeling

Interrogative form

Simple form	V-ing form
could I corbel? could you corbel? could he corbel? could we corbel? could you corbel? could they corbel?	could I be corbeling? could you be corbeling? could he be corbeling? could we be corbeling? could you be corbeling? could they be corbeling?
Perfect	V-ing perfect
could I have corbeled? could you have corbeled? could he have corbeled? could we have corbeled? could you have corbeled? could they have corbeled?	could I have been corbeling? could you have been corbeling? could he have been corbeling? could we have been corbeling? could you have been corbeling? could they have been corbeling?

Interro-negative form

Simple form	V-ing form
couldn't I corbel? couldn't you corbel? couldn't he corbel? couldn't we corbel? couldn't you corbel? couldn't they corbel?	couldn't I be corbeling? couldn't you be corbeling? couldn't he be corbeling? couldn't we be corbeling? couldn't you be corbeling? couldn't they be corbeling?
Perfect	V-ing perfect
couldn't I have corbeled? couldn't you have corbeled? couldn't he have corbeled? couldn't we have corbeled? couldn't you have corbeled? couldn't they have corbeled?	couldn't I have been corbeling? couldn't you have been corbeling? couldn't he have been corbeling? couldn't we have been corbeling? couldn't you have been corbeling? couldn't they have been corbeling?