must erupt
Verbo regular: erupt - erupted- erupted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must erupt
you must erupt
he must erupt
we must erupt
you must erupt
they must erupt 	I must be erupting
you must be erupting
he must be erupting
we must be erupting
you must be erupting
they must be erupting	I must have erupted
you must have erupted
he must have erupted
we must have erupted
you must have erupted
they must have erupted	I must have been erupting
you must have been erupting
he must have been erupting
we must have been erupting
you must have been erupting
they must have been erupting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not erupt
you must not erupt
he must not erupt
we must not erupt
you must not erupt
they must not erupt 	I must not be erupting
you must not be erupting
he must not be erupting
we must not be erupting
you must not be erupting
they must not be erupting	I must not have erupted
you must not have erupted
he must not have erupted
we must not have erupted
you must not have erupted
they must not have erupted	I must not have been erupting
you must not have been erupting
he must not have been erupting
we must not have been erupting
you must not have been erupting
they must not have been erupting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I erupt?
must you erupt?
must he erupt?
must we erupt?
must you erupt?
must they erupt? 	must I be erupting?
must you be erupting?
must he be erupting?
must we be erupting?
must you be erupting?
must they be erupting? 	must I have erupted?
must you have erupted?
must he have erupted?
must we have erupted?
must you have erupted?
must they have erupted? 	must I have been erupting?
must you have been erupting?
must he have been erupting?
must we have been erupting?
must you have been erupting?
must they have been erupting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not erupt?
must you not erupt?
must he not erupt?
must we not erupt?
must you not erupt?
must they not erupt? 	must I not be erupting?
must you not be erupting?
must he not be erupting?
must we not be erupting?
must you not be erupting?
must they not be erupting? 	must I not have erupted?
must you not have erupted?
must he not have erupted?
must we not have erupted?
must you not have erupted?
must they not have erupted? 	must I not have been erupting?
must you not have been erupting?
must he not have been erupting?
must we not have been erupting?
must you not have been erupting?
must they not have been erupting?