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 couldn't ravel you couldn't ravel he couldn't ravel we couldn't ravel you couldn't ravel they couldn't ravel	I couldn't be ravelling you couldn't be ravelling he couldn't be ravelling we couldn't be ravelling you couldn't be ravelling they couldn't be ravelling
Perfect	V-ing perfect
I couldn't have ravelled you couldn't have ravelled he couldn't have ravelled we couldn't have ravelled you couldn't have ravelled they couldn't have ravelled	I couldn't have been ravelling you couldn't have been ravelling he couldn't have been ravelling we couldn't have been ravelling you couldn't have been ravelling they couldn't 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
couldn't I ravel? couldn't you ravel? couldn't he ravel? couldn't we ravel? couldn't you ravel? couldn't they ravel?	couldn't I be ravelling? couldn't you be ravelling? couldn't he be ravelling? couldn't we be ravelling? couldn't you be ravelling? couldn't they be ravelling?
Perfect	V-ing perfect
couldn't I have ravelled? couldn't you have ravelled? couldn't he have ravelled? couldn't we have ravelled? couldn't you have ravelled? couldn't they have ravelled?	couldn't I have been ravelling? couldn't you have been ravelling? couldn't he have been ravelling? couldn't we have been ravelling? couldn't you have been ravelling? couldn't they have been ravelling?