English verb conjugation
COULD SORROW

Regular verb: sorrow - sorrowed - sorrowed

Affirmation

Simple form	V-ing form
I could sorrow you could sorrow he could sorrow we could sorrow you could sorrow they could sorrow	I could be sorrowing you could be sorrowing he could be sorrowing we could be sorrowing you could be sorrowing they could be sorrowing
Perfect	V-ing perfect
I could have sorrowed you could have sorrowed he could have sorrowed we could have sorrowed you could have sorrowed they could have sorrowed	I could have been sorrowing you could have been sorrowing he could have been sorrowing we could have been sorrowing you could have been sorrowing they could have been sorrowing

Negation

Simple form	V-ing form
I could not sorrow you could not sorrow he could not sorrow we could not sorrow you could not sorrow they could not sorrow	I could not be sorrowing you could not be sorrowing he could not be sorrowing we could not be sorrowing you could not be sorrowing they could not be sorrowing
Perfect	V-ing perfect
I could not have sorrowed you could not have sorrowed he could not have sorrowed we could not have sorrowed you could not have sorrowed they could not have sorrowed	I could not have been sorrowing you could not have been sorrowing he could not have been sorrowing we could not have been sorrowing you could not have been sorrowing they could not have been sorrowing

Interrogative form

Simple form	V-ing form
could I sorrow? could you sorrow? could he sorrow? could we sorrow? could you sorrow? could they sorrow?	could I be sorrowing? could you be sorrowing? could he be sorrowing? could we be sorrowing? could you be sorrowing? could they be sorrowing?
Perfect	V-ing perfect
could I have sorrowed? could you have sorrowed? could he have sorrowed? could we have sorrowed? could you have sorrowed? could they have sorrowed?	could I have been sorrowing? could you have been sorrowing? could he have been sorrowing? could we have been sorrowing? could you have been sorrowing? could they have been sorrowing?

Interro-negative form

Simple form	V-ing form
could I not sorrow? could you not sorrow? could he not sorrow? could we not sorrow? could you not sorrow? could they not sorrow?	could I not be sorrowing? could you not be sorrowing? could he not be sorrowing? could we not be sorrowing? could you not be sorrowing? could they not be sorrowing?
Perfect	V-ing perfect
could I not have sorrowed? could you not have sorrowed? could he not have sorrowed? could we not have sorrowed? could you not have sorrowed? could they not have sorrowed?	could I not have been sorrowing? could you not have been sorrowing? could he not have been sorrowing? could we not have been sorrowing? could you not have been sorrowing? could they not have been sorrowing?