English verb conjugation
MUST RAVEL

Regular verb: ravel - ravelled - ravelled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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