must sulfurise
Verbo regular: sulfurise - sulfurised- sulfurised

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must sulfurise
you must sulfurise
he must sulfurise
we must sulfurise
you must sulfurise
they must sulfurise 	I must be sulfurising
you must be sulfurising
he must be sulfurising
we must be sulfurising
you must be sulfurising
they must be sulfurising	I must have sulfurised
you must have sulfurised
he must have sulfurised
we must have sulfurised
you must have sulfurised
they must have sulfurised	I must have been sulfurising
you must have been sulfurising
he must have been sulfurising
we must have been sulfurising
you must have been sulfurising
they must have been sulfurising	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not sulfurise
you must not sulfurise
he must not sulfurise
we must not sulfurise
you must not sulfurise
they must not sulfurise 	I must not be sulfurising
you must not be sulfurising
he must not be sulfurising
we must not be sulfurising
you must not be sulfurising
they must not be sulfurising	I must not have sulfurised
you must not have sulfurised
he must not have sulfurised
we must not have sulfurised
you must not have sulfurised
they must not have sulfurised	I must not have been sulfurising
you must not have been sulfurising
he must not have been sulfurising
we must not have been sulfurising
you must not have been sulfurising
they must not have been sulfurising	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I sulfurise?
must you sulfurise?
must he sulfurise?
must we sulfurise?
must you sulfurise?
must they sulfurise? 	must I be sulfurising?
must you be sulfurising?
must he be sulfurising?
must we be sulfurising?
must you be sulfurising?
must they be sulfurising? 	must I have sulfurised?
must you have sulfurised?
must he have sulfurised?
must we have sulfurised?
must you have sulfurised?
must they have sulfurised? 	must I have been sulfurising?
must you have been sulfurising?
must he have been sulfurising?
must we have been sulfurising?
must you have been sulfurising?
must they have been sulfurising? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not sulfurise?
must you not sulfurise?
must he not sulfurise?
must we not sulfurise?
must you not sulfurise?
must they not sulfurise? 	must I not be sulfurising?
must you not be sulfurising?
must he not be sulfurising?
must we not be sulfurising?
must you not be sulfurising?
must they not be sulfurising? 	must I not have sulfurised?
must you not have sulfurised?
must he not have sulfurised?
must we not have sulfurised?
must you not have sulfurised?
must they not have sulfurised? 	must I not have been sulfurising?
must you not have been sulfurising?
must he not have been sulfurising?
must we not have been sulfurising?
must you not have been sulfurising?
must they not have been sulfurising?