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