English verb conjugation
MUST RECUR

Regular verb: recur - recurred - recurred

Affirmation

Simple form	V-ing form
I must recur you must recur he must recur we must recur you must recur they must recur	I must be recurring you must be recurring he must be recurring we must be recurring you must be recurring they must be recurring
Perfect	V-ing perfect
I must have recurred you must have recurred he must have recurred we must have recurred you must have recurred they must have recurred	I must have been recurring you must have been recurring he must have been recurring we must have been recurring you must have been recurring they must have been recurring

Negation

Simple form	V-ing form
I mustn't recur you mustn't recur he mustn't recur we mustn't recur you mustn't recur they mustn't recur	I mustn't be recurring you mustn't be recurring he mustn't be recurring we mustn't be recurring you mustn't be recurring they mustn't be recurring
Perfect	V-ing perfect
I mustn't have recurred you mustn't have recurred he mustn't have recurred we mustn't have recurred you mustn't have recurred they mustn't have recurred	I mustn't have been recurring you mustn't have been recurring he mustn't have been recurring we mustn't have been recurring you mustn't have been recurring they mustn't have been recurring

Interrogative form

Simple form	V-ing form
must I recur? must you recur? must he recur? must we recur? must you recur? must they recur?	must I be recurring? must you be recurring? must he be recurring? must we be recurring? must you be recurring? must they be recurring?
Perfect	V-ing perfect
must I have recurred? must you have recurred? must he have recurred? must we have recurred? must you have recurred? must they have recurred?	must I have been recurring? must you have been recurring? must he have been recurring? must we have been recurring? must you have been recurring? must they have been recurring?

Interro-negative form

Simple form	V-ing form
mustn't I recur? mustn't you recur? mustn't he recur? mustn't we recur? mustn't you recur? mustn't they recur?	mustn't I be recurring? mustn't you be recurring? mustn't he be recurring? mustn't we be recurring? mustn't you be recurring? mustn't they be recurring?
Perfect	V-ing perfect
mustn't I have recurred? mustn't you have recurred? mustn't he have recurred? mustn't we have recurred? mustn't you have recurred? mustn't they have recurred?	mustn't I have been recurring? mustn't you have been recurring? mustn't he have been recurring? mustn't we have been recurring? mustn't you have been recurring? mustn't they have been recurring?