must oblige
Verbo regular: oblige - obliged- obliged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must oblige
you must oblige
he must oblige
we must oblige
you must oblige
they must oblige 	I must be obliging
you must be obliging
he must be obliging
we must be obliging
you must be obliging
they must be obliging	I must have obliged
you must have obliged
he must have obliged
we must have obliged
you must have obliged
they must have obliged	I must have been obliging
you must have been obliging
he must have been obliging
we must have been obliging
you must have been obliging
they must have been obliging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not oblige
you must not oblige
he must not oblige
we must not oblige
you must not oblige
they must not oblige 	I must not be obliging
you must not be obliging
he must not be obliging
we must not be obliging
you must not be obliging
they must not be obliging	I must not have obliged
you must not have obliged
he must not have obliged
we must not have obliged
you must not have obliged
they must not have obliged	I must not have been obliging
you must not have been obliging
he must not have been obliging
we must not have been obliging
you must not have been obliging
they must not have been obliging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I oblige?
must you oblige?
must he oblige?
must we oblige?
must you oblige?
must they oblige? 	must I be obliging?
must you be obliging?
must he be obliging?
must we be obliging?
must you be obliging?
must they be obliging? 	must I have obliged?
must you have obliged?
must he have obliged?
must we have obliged?
must you have obliged?
must they have obliged? 	must I have been obliging?
must you have been obliging?
must he have been obliging?
must we have been obliging?
must you have been obliging?
must they have been obliging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not oblige?
must you not oblige?
must he not oblige?
must we not oblige?
must you not oblige?
must they not oblige? 	must I not be obliging?
must you not be obliging?
must he not be obliging?
must we not be obliging?
must you not be obliging?
must they not be obliging? 	must I not have obliged?
must you not have obliged?
must he not have obliged?
must we not have obliged?
must you not have obliged?
must they not have obliged? 	must I not have been obliging?
must you not have been obliging?
must he not have been obliging?
must we not have been obliging?
must you not have been obliging?
must they not have been obliging?