must quaff
Verbo regular: quaff - quaffed- quaffed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must quaff
you must quaff
she must quaff
we must quaff
you must quaff
they must quaff 	I must be quaffing
you must be quaffing
she must be quaffing
we must be quaffing
you must be quaffing
they must be quaffing	I must have quaffed
you must have quaffed
she must have quaffed
we must have quaffed
you must have quaffed
they must have quaffed	I must have been quaffing
you must have been quaffing
she must have been quaffing
we must have been quaffing
you must have been quaffing
they must have been quaffing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not quaff
you must not quaff
she must not quaff
we must not quaff
you must not quaff
they must not quaff 	I must not be quaffing
you must not be quaffing
she must not be quaffing
we must not be quaffing
you must not be quaffing
they must not be quaffing	I must not have quaffed
you must not have quaffed
she must not have quaffed
we must not have quaffed
you must not have quaffed
they must not have quaffed	I must not have been quaffing
you must not have been quaffing
she must not have been quaffing
we must not have been quaffing
you must not have been quaffing
they must not have been quaffing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I quaff?
must you quaff?
must she quaff?
must we quaff?
must you quaff?
must they quaff? 	must I be quaffing?
must you be quaffing?
must she be quaffing?
must we be quaffing?
must you be quaffing?
must they be quaffing? 	must I have quaffed?
must you have quaffed?
must she have quaffed?
must we have quaffed?
must you have quaffed?
must they have quaffed? 	must I have been quaffing?
must you have been quaffing?
must she have been quaffing?
must we have been quaffing?
must you have been quaffing?
must they have been quaffing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not quaff?
must you not quaff?
must she not quaff?
must we not quaff?
must you not quaff?
must they not quaff? 	must I not be quaffing?
must you not be quaffing?
must she not be quaffing?
must we not be quaffing?
must you not be quaffing?
must they not be quaffing? 	must I not have quaffed?
must you not have quaffed?
must she not have quaffed?
must we not have quaffed?
must you not have quaffed?
must they not have quaffed? 	must I not have been quaffing?
must you not have been quaffing?
must she not have been quaffing?
must we not have been quaffing?
must you not have been quaffing?
must they not have been quaffing?