must shred
Verbo regular: shred - shredded- shredded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must shred
you must shred
she must shred
we must shred
you must shred
they must shred 	I must be shredding
you must be shredding
she must be shredding
we must be shredding
you must be shredding
they must be shredding	I must have shredded
you must have shredded
she must have shredded
we must have shredded
you must have shredded
they must have shredded	I must have been shredding
you must have been shredding
she must have been shredding
we must have been shredding
you must have been shredding
they must have been shredding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not shred
you must not shred
she must not shred
we must not shred
you must not shred
they must not shred 	I must not be shredding
you must not be shredding
she must not be shredding
we must not be shredding
you must not be shredding
they must not be shredding	I must not have shredded
you must not have shredded
she must not have shredded
we must not have shredded
you must not have shredded
they must not have shredded	I must not have been shredding
you must not have been shredding
she must not have been shredding
we must not have been shredding
you must not have been shredding
they must not have been shredding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I shred?
must you shred?
must she shred?
must we shred?
must you shred?
must they shred? 	must I be shredding?
must you be shredding?
must she be shredding?
must we be shredding?
must you be shredding?
must they be shredding? 	must I have shredded?
must you have shredded?
must she have shredded?
must we have shredded?
must you have shredded?
must they have shredded? 	must I have been shredding?
must you have been shredding?
must she have been shredding?
must we have been shredding?
must you have been shredding?
must they have been shredding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not shred?
must you not shred?
must she not shred?
must we not shred?
must you not shred?
must they not shred? 	must I not be shredding?
must you not be shredding?
must she not be shredding?
must we not be shredding?
must you not be shredding?
must they not be shredding? 	must I not have shredded?
must you not have shredded?
must she not have shredded?
must we not have shredded?
must you not have shredded?
must they not have shredded? 	must I not have been shredding?
must you not have been shredding?
must she not have been shredding?
must we not have been shredding?
must you not have been shredding?
must they not have been shredding?