English verb conjugation
COULD RAVEL

Regular verb: ravel - ravelled - ravelled

Affirmation

Simple form	V-ing form
I could ravel you could ravel he could ravel we could ravel you could ravel they could ravel	I could be ravelling you could be ravelling he could be ravelling we could be ravelling you could be ravelling they could be ravelling
Perfect	V-ing perfect
I could have ravelled you could have ravelled he could have ravelled we could have ravelled you could have ravelled they could have ravelled	I could have been ravelling you could have been ravelling he could have been ravelling we could have been ravelling you could have been ravelling they could have been ravelling

Negation

Simple form	V-ing form
I could not ravel you could not ravel he could not ravel we could not ravel you could not ravel they could not ravel	I could not be ravelling you could not be ravelling he could not be ravelling we could not be ravelling you could not be ravelling they could not be ravelling
Perfect	V-ing perfect
I could not have ravelled you could not have ravelled he could not have ravelled we could not have ravelled you could not have ravelled they could not have ravelled	I could not have been ravelling you could not have been ravelling he could not have been ravelling we could not have been ravelling you could not have been ravelling they could not have been ravelling

Interrogative form

Simple form	V-ing form
could I ravel? could you ravel? could he ravel? could we ravel? could you ravel? could they ravel?	could I be ravelling? could you be ravelling? could he be ravelling? could we be ravelling? could you be ravelling? could they be ravelling?
Perfect	V-ing perfect
could I have ravelled? could you have ravelled? could he have ravelled? could we have ravelled? could you have ravelled? could they have ravelled?	could I have been ravelling? could you have been ravelling? could he have been ravelling? could we have been ravelling? could you have been ravelling? could they have been ravelling?

Interro-negative form

Simple form	V-ing form
could I not ravel? could you not ravel? could he not ravel? could we not ravel? could you not ravel? could they not ravel?	could I not be ravelling? could you not be ravelling? could he not be ravelling? could we not be ravelling? could you not be ravelling? could they not be ravelling?
Perfect	V-ing perfect
could I not have ravelled? could you not have ravelled? could he not have ravelled? could we not have ravelled? could you not have ravelled? could they not have ravelled?	could I not have been ravelling? could you not have been ravelling? could he not have been ravelling? could we not have been ravelling? could you not have been ravelling? could they not have been ravelling?