must arbitrate
Verbo regular: arbitrate - arbitrated- arbitrated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must arbitrate
you must arbitrate
he must arbitrate
we must arbitrate
you must arbitrate
they must arbitrate 	I must be arbitrating
you must be arbitrating
he must be arbitrating
we must be arbitrating
you must be arbitrating
they must be arbitrating	I must have arbitrated
you must have arbitrated
he must have arbitrated
we must have arbitrated
you must have arbitrated
they must have arbitrated	I must have been arbitrating
you must have been arbitrating
he must have been arbitrating
we must have been arbitrating
you must have been arbitrating
they must have been arbitrating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not arbitrate
you must not arbitrate
he must not arbitrate
we must not arbitrate
you must not arbitrate
they must not arbitrate 	I must not be arbitrating
you must not be arbitrating
he must not be arbitrating
we must not be arbitrating
you must not be arbitrating
they must not be arbitrating	I must not have arbitrated
you must not have arbitrated
he must not have arbitrated
we must not have arbitrated
you must not have arbitrated
they must not have arbitrated	I must not have been arbitrating
you must not have been arbitrating
he must not have been arbitrating
we must not have been arbitrating
you must not have been arbitrating
they must not have been arbitrating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I arbitrate?
must you arbitrate?
must he arbitrate?
must we arbitrate?
must you arbitrate?
must they arbitrate? 	must I be arbitrating?
must you be arbitrating?
must he be arbitrating?
must we be arbitrating?
must you be arbitrating?
must they be arbitrating? 	must I have arbitrated?
must you have arbitrated?
must he have arbitrated?
must we have arbitrated?
must you have arbitrated?
must they have arbitrated? 	must I have been arbitrating?
must you have been arbitrating?
must he have been arbitrating?
must we have been arbitrating?
must you have been arbitrating?
must they have been arbitrating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not arbitrate?
must you not arbitrate?
must he not arbitrate?
must we not arbitrate?
must you not arbitrate?
must they not arbitrate? 	must I not be arbitrating?
must you not be arbitrating?
must he not be arbitrating?
must we not be arbitrating?
must you not be arbitrating?
must they not be arbitrating? 	must I not have arbitrated?
must you not have arbitrated?
must he not have arbitrated?
must we not have arbitrated?
must you not have arbitrated?
must they not have arbitrated? 	must I not have been arbitrating?
must you not have been arbitrating?
must he not have been arbitrating?
must we not have been arbitrating?
must you not have been arbitrating?
must they not have been arbitrating?