must sorrow
Verbo regular: sorrow - sorrowed- sorrowed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must sorrow
you must sorrow
he must sorrow
we must sorrow
you must sorrow
they must sorrow 	I must be sorrowing
you must be sorrowing
he must be sorrowing
we must be sorrowing
you must be sorrowing
they must be sorrowing	I must have sorrowed
you must have sorrowed
he must have sorrowed
we must have sorrowed
you must have sorrowed
they must have sorrowed	I must have been sorrowing
you must have been sorrowing
he must have been sorrowing
we must have been sorrowing
you must have been sorrowing
they must have been sorrowing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not sorrow
you must not sorrow
he must not sorrow
we must not sorrow
you must not sorrow
they must not sorrow 	I must not be sorrowing
you must not be sorrowing
he must not be sorrowing
we must not be sorrowing
you must not be sorrowing
they must not be sorrowing	I must not have sorrowed
you must not have sorrowed
he must not have sorrowed
we must not have sorrowed
you must not have sorrowed
they must not have sorrowed	I must not have been sorrowing
you must not have been sorrowing
he must not have been sorrowing
we must not have been sorrowing
you must not have been sorrowing
they must not have been sorrowing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I sorrow?
must you sorrow?
must he sorrow?
must we sorrow?
must you sorrow?
must they sorrow? 	must I be sorrowing?
must you be sorrowing?
must he be sorrowing?
must we be sorrowing?
must you be sorrowing?
must they be sorrowing? 	must I have sorrowed?
must you have sorrowed?
must he have sorrowed?
must we have sorrowed?
must you have sorrowed?
must they have sorrowed? 	must I have been sorrowing?
must you have been sorrowing?
must he have been sorrowing?
must we have been sorrowing?
must you have been sorrowing?
must they have been sorrowing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not sorrow?
must you not sorrow?
must he not sorrow?
must we not sorrow?
must you not sorrow?
must they not sorrow? 	must I not be sorrowing?
must you not be sorrowing?
must he not be sorrowing?
must we not be sorrowing?
must you not be sorrowing?
must they not be sorrowing? 	must I not have sorrowed?
must you not have sorrowed?
must he not have sorrowed?
must we not have sorrowed?
must you not have sorrowed?
must they not have sorrowed? 	must I not have been sorrowing?
must you not have been sorrowing?
must he not have been sorrowing?
must we not have been sorrowing?
must you not have been sorrowing?
must they not have been sorrowing?