must forfeit
Verbo regular: forfeit - forfeited- forfeited

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must forfeit
you must forfeit
he must forfeit
we must forfeit
you must forfeit
they must forfeit 	I must be forfeiting
you must be forfeiting
he must be forfeiting
we must be forfeiting
you must be forfeiting
they must be forfeiting	I must have forfeited
you must have forfeited
he must have forfeited
we must have forfeited
you must have forfeited
they must have forfeited	I must have been forfeiting
you must have been forfeiting
he must have been forfeiting
we must have been forfeiting
you must have been forfeiting
they must have been forfeiting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not forfeit
you must not forfeit
he must not forfeit
we must not forfeit
you must not forfeit
they must not forfeit 	I must not be forfeiting
you must not be forfeiting
he must not be forfeiting
we must not be forfeiting
you must not be forfeiting
they must not be forfeiting	I must not have forfeited
you must not have forfeited
he must not have forfeited
we must not have forfeited
you must not have forfeited
they must not have forfeited	I must not have been forfeiting
you must not have been forfeiting
he must not have been forfeiting
we must not have been forfeiting
you must not have been forfeiting
they must not have been forfeiting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I forfeit?
must you forfeit?
must he forfeit?
must we forfeit?
must you forfeit?
must they forfeit? 	must I be forfeiting?
must you be forfeiting?
must he be forfeiting?
must we be forfeiting?
must you be forfeiting?
must they be forfeiting? 	must I have forfeited?
must you have forfeited?
must he have forfeited?
must we have forfeited?
must you have forfeited?
must they have forfeited? 	must I have been forfeiting?
must you have been forfeiting?
must he have been forfeiting?
must we have been forfeiting?
must you have been forfeiting?
must they have been forfeiting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not forfeit?
must you not forfeit?
must he not forfeit?
must we not forfeit?
must you not forfeit?
must they not forfeit? 	must I not be forfeiting?
must you not be forfeiting?
must he not be forfeiting?
must we not be forfeiting?
must you not be forfeiting?
must they not be forfeiting? 	must I not have forfeited?
must you not have forfeited?
must he not have forfeited?
must we not have forfeited?
must you not have forfeited?
must they not have forfeited? 	must I not have been forfeiting?
must you not have been forfeiting?
must he not have been forfeiting?
must we not have been forfeiting?
must you not have been forfeiting?
must they not have been forfeiting?