English verb conjugation
MUST RAVEN

Regular verb: raven - ravened - ravened

Affirmation

Simple form	V-ing form
I must raven you must raven he must raven we must raven you must raven they must raven	I must be ravening you must be ravening he must be ravening we must be ravening you must be ravening they must be ravening
Perfect	V-ing perfect
I must have ravened you must have ravened he must have ravened we must have ravened you must have ravened they must have ravened	I must have been ravening you must have been ravening he must have been ravening we must have been ravening you must have been ravening they must have been ravening

Negation

Simple form	V-ing form
I must not raven you must not raven he must not raven we must not raven you must not raven they must not raven	I must not be ravening you must not be ravening he must not be ravening we must not be ravening you must not be ravening they must not be ravening
Perfect	V-ing perfect
I must not have ravened you must not have ravened he must not have ravened we must not have ravened you must not have ravened they must not have ravened	I must not have been ravening you must not have been ravening he must not have been ravening we must not have been ravening you must not have been ravening they must not have been ravening

Interrogative form

Simple form	V-ing form
must I raven? must you raven? must he raven? must we raven? must you raven? must they raven?	must I be ravening? must you be ravening? must he be ravening? must we be ravening? must you be ravening? must they be ravening?
Perfect	V-ing perfect
must I have ravened? must you have ravened? must he have ravened? must we have ravened? must you have ravened? must they have ravened?	must I have been ravening? must you have been ravening? must he have been ravening? must we have been ravening? must you have been ravening? must they have been ravening?

Interro-negative form

Simple form	V-ing form
must I not raven? must you not raven? must he not raven? must we not raven? must you not raven? must they not raven?	must I not be ravening? must you not be ravening? must he not be ravening? must we not be ravening? must you not be ravening? must they not be ravening?
Perfect	V-ing perfect
must I not have ravened? must you not have ravened? must he not have ravened? must we not have ravened? must you not have ravened? must they not have ravened?	must I not have been ravening? must you not have been ravening? must he not have been ravening? must we not have been ravening? must you not have been ravening? must they not have been ravening?