must erode
Verbo regular: erode - eroded- eroded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must erode
you must erode
he must erode
we must erode
you must erode
they must erode 	I must be eroding
you must be eroding
he must be eroding
we must be eroding
you must be eroding
they must be eroding	I must have eroded
you must have eroded
he must have eroded
we must have eroded
you must have eroded
they must have eroded	I must have been eroding
you must have been eroding
he must have been eroding
we must have been eroding
you must have been eroding
they must have been eroding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not erode
you must not erode
he must not erode
we must not erode
you must not erode
they must not erode 	I must not be eroding
you must not be eroding
he must not be eroding
we must not be eroding
you must not be eroding
they must not be eroding	I must not have eroded
you must not have eroded
he must not have eroded
we must not have eroded
you must not have eroded
they must not have eroded	I must not have been eroding
you must not have been eroding
he must not have been eroding
we must not have been eroding
you must not have been eroding
they must not have been eroding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I erode?
must you erode?
must he erode?
must we erode?
must you erode?
must they erode? 	must I be eroding?
must you be eroding?
must he be eroding?
must we be eroding?
must you be eroding?
must they be eroding? 	must I have eroded?
must you have eroded?
must he have eroded?
must we have eroded?
must you have eroded?
must they have eroded? 	must I have been eroding?
must you have been eroding?
must he have been eroding?
must we have been eroding?
must you have been eroding?
must they have been eroding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not erode?
must you not erode?
must he not erode?
must we not erode?
must you not erode?
must they not erode? 	must I not be eroding?
must you not be eroding?
must he not be eroding?
must we not be eroding?
must you not be eroding?
must they not be eroding? 	must I not have eroded?
must you not have eroded?
must he not have eroded?
must we not have eroded?
must you not have eroded?
must they not have eroded? 	must I not have been eroding?
must you not have been eroding?
must he not have been eroding?
must we not have been eroding?
must you not have been eroding?
must they not have been eroding?