must recur
Verbo regular: recur - recurred- recurred

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not recur
you must not recur
he must not recur
we must not recur
you must not recur
they must not recur 	I must not be recurring
you must not be recurring
he must not be recurring
we must not be recurring
you must not be recurring
they must not be recurring	I must not have recurred
you must not have recurred
he must not have recurred
we must not have recurred
you must not have recurred
they must not have recurred	I must not have been recurring
you must not have been recurring
he must not have been recurring
we must not have been recurring
you must not have been recurring
they must not have been recurring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not recur?
must you not recur?
must he not recur?
must we not recur?
must you not recur?
must they not recur? 	must I not be recurring?
must you not be recurring?
must he not be recurring?
must we not be recurring?
must you not be recurring?
must they not be recurring? 	must I not have recurred?
must you not have recurred?
must he not have recurred?
must we not have recurred?
must you not have recurred?
must they not have recurred? 	must I not have been recurring?
must you not have been recurring?
must he not have been recurring?
must we not have been recurring?
must you not have been recurring?
must they not have been recurring?