must return
Verbo regular: return - returned- returned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must return
you must return
he must return
we must return
you must return
they must return 	I must be returning
you must be returning
he must be returning
we must be returning
you must be returning
they must be returning	I must have returned
you must have returned
he must have returned
we must have returned
you must have returned
they must have returned	I must have been returning
you must have been returning
he must have been returning
we must have been returning
you must have been returning
they must have been returning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not return
you must not return
he must not return
we must not return
you must not return
they must not return 	I must not be returning
you must not be returning
he must not be returning
we must not be returning
you must not be returning
they must not be returning	I must not have returned
you must not have returned
he must not have returned
we must not have returned
you must not have returned
they must not have returned	I must not have been returning
you must not have been returning
he must not have been returning
we must not have been returning
you must not have been returning
they must not have been returning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I return?
must you return?
must he return?
must we return?
must you return?
must they return? 	must I be returning?
must you be returning?
must he be returning?
must we be returning?
must you be returning?
must they be returning? 	must I have returned?
must you have returned?
must he have returned?
must we have returned?
must you have returned?
must they have returned? 	must I have been returning?
must you have been returning?
must he have been returning?
must we have been returning?
must you have been returning?
must they have been returning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not return?
must you not return?
must he not return?
must we not return?
must you not return?
must they not return? 	must I not be returning?
must you not be returning?
must he not be returning?
must we not be returning?
must you not be returning?
must they not be returning? 	must I not have returned?
must you not have returned?
must he not have returned?
must we not have returned?
must you not have returned?
must they not have returned? 	must I not have been returning?
must you not have been returning?
must he not have been returning?
must we not have been returning?
must you not have been returning?
must they not have been returning?