must discourse
Verbo regular: discourse - discoursed- discoursed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must discourse
you must discourse
he must discourse
we must discourse
you must discourse
they must discourse 	I must be discoursing
you must be discoursing
he must be discoursing
we must be discoursing
you must be discoursing
they must be discoursing	I must have discoursed
you must have discoursed
he must have discoursed
we must have discoursed
you must have discoursed
they must have discoursed	I must have been discoursing
you must have been discoursing
he must have been discoursing
we must have been discoursing
you must have been discoursing
they must have been discoursing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not discourse
you must not discourse
he must not discourse
we must not discourse
you must not discourse
they must not discourse 	I must not be discoursing
you must not be discoursing
he must not be discoursing
we must not be discoursing
you must not be discoursing
they must not be discoursing	I must not have discoursed
you must not have discoursed
he must not have discoursed
we must not have discoursed
you must not have discoursed
they must not have discoursed	I must not have been discoursing
you must not have been discoursing
he must not have been discoursing
we must not have been discoursing
you must not have been discoursing
they must not have been discoursing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I discourse?
must you discourse?
must he discourse?
must we discourse?
must you discourse?
must they discourse? 	must I be discoursing?
must you be discoursing?
must he be discoursing?
must we be discoursing?
must you be discoursing?
must they be discoursing? 	must I have discoursed?
must you have discoursed?
must he have discoursed?
must we have discoursed?
must you have discoursed?
must they have discoursed? 	must I have been discoursing?
must you have been discoursing?
must he have been discoursing?
must we have been discoursing?
must you have been discoursing?
must they have been discoursing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not discourse?
must you not discourse?
must he not discourse?
must we not discourse?
must you not discourse?
must they not discourse? 	must I not be discoursing?
must you not be discoursing?
must he not be discoursing?
must we not be discoursing?
must you not be discoursing?
must they not be discoursing? 	must I not have discoursed?
must you not have discoursed?
must he not have discoursed?
must we not have discoursed?
must you not have discoursed?
must they not have discoursed? 	must I not have been discoursing?
must you not have been discoursing?
must he not have been discoursing?
must we not have been discoursing?
must you not have been discoursing?
must they not have been discoursing?