must believe
Verbo regular: believe - believed- believed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must believe
you must believe
she must believe
we must believe
you must believe
they must believe 	I must be believing
you must be believing
she must be believing
we must be believing
you must be believing
they must be believing	I must have believed
you must have believed
she must have believed
we must have believed
you must have believed
they must have believed	I must have been believing
you must have been believing
she must have been believing
we must have been believing
you must have been believing
they must have been believing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not believe
you must not believe
she must not believe
we must not believe
you must not believe
they must not believe 	I must not be believing
you must not be believing
she must not be believing
we must not be believing
you must not be believing
they must not be believing	I must not have believed
you must not have believed
she must not have believed
we must not have believed
you must not have believed
they must not have believed	I must not have been believing
you must not have been believing
she must not have been believing
we must not have been believing
you must not have been believing
they must not have been believing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I believe?
must you believe?
must she believe?
must we believe?
must you believe?
must they believe? 	must I be believing?
must you be believing?
must she be believing?
must we be believing?
must you be believing?
must they be believing? 	must I have believed?
must you have believed?
must she have believed?
must we have believed?
must you have believed?
must they have believed? 	must I have been believing?
must you have been believing?
must she have been believing?
must we have been believing?
must you have been believing?
must they have been believing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not believe?
must you not believe?
must she not believe?
must we not believe?
must you not believe?
must they not believe? 	must I not be believing?
must you not be believing?
must she not be believing?
must we not be believing?
must you not be believing?
must they not be believing? 	must I not have believed?
must you not have believed?
must she not have believed?
must we not have believed?
must you not have believed?
must they not have believed? 	must I not have been believing?
must you not have been believing?
must she not have been believing?
must we not have been believing?
must you not have been believing?
must they not have been believing?