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 mustn't raven you mustn't raven he mustn't raven we mustn't raven you mustn't raven they mustn't raven	I mustn't be ravening you mustn't be ravening he mustn't be ravening we mustn't be ravening you mustn't be ravening they mustn't be ravening
Perfect	V-ing perfect
I mustn't have ravened you mustn't have ravened he mustn't have ravened we mustn't have ravened you mustn't have ravened they mustn't have ravened	I mustn't have been ravening you mustn't have been ravening he mustn't have been ravening we mustn't have been ravening you mustn't have been ravening they mustn't 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
mustn't I raven? mustn't you raven? mustn't he raven? mustn't we raven? mustn't you raven? mustn't they raven?	mustn't I be ravening? mustn't you be ravening? mustn't he be ravening? mustn't we be ravening? mustn't you be ravening? mustn't they be ravening?
Perfect	V-ing perfect
mustn't I have ravened? mustn't you have ravened? mustn't he have ravened? mustn't we have ravened? mustn't you have ravened? mustn't they have ravened?	mustn't I have been ravening? mustn't you have been ravening? mustn't he have been ravening? mustn't we have been ravening? mustn't you have been ravening? mustn't they have been ravening?