must shudder
Verbo regular: shudder - shuddered- shuddered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must shudder
you must shudder
he must shudder
we must shudder
you must shudder
they must shudder 	I must be shuddering
you must be shuddering
he must be shuddering
we must be shuddering
you must be shuddering
they must be shuddering	I must have shuddered
you must have shuddered
he must have shuddered
we must have shuddered
you must have shuddered
they must have shuddered	I must have been shuddering
you must have been shuddering
he must have been shuddering
we must have been shuddering
you must have been shuddering
they must have been shuddering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not shudder
you must not shudder
he must not shudder
we must not shudder
you must not shudder
they must not shudder 	I must not be shuddering
you must not be shuddering
he must not be shuddering
we must not be shuddering
you must not be shuddering
they must not be shuddering	I must not have shuddered
you must not have shuddered
he must not have shuddered
we must not have shuddered
you must not have shuddered
they must not have shuddered	I must not have been shuddering
you must not have been shuddering
he must not have been shuddering
we must not have been shuddering
you must not have been shuddering
they must not have been shuddering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I shudder?
must you shudder?
must he shudder?
must we shudder?
must you shudder?
must they shudder? 	must I be shuddering?
must you be shuddering?
must he be shuddering?
must we be shuddering?
must you be shuddering?
must they be shuddering? 	must I have shuddered?
must you have shuddered?
must he have shuddered?
must we have shuddered?
must you have shuddered?
must they have shuddered? 	must I have been shuddering?
must you have been shuddering?
must he have been shuddering?
must we have been shuddering?
must you have been shuddering?
must they have been shuddering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not shudder?
must you not shudder?
must he not shudder?
must we not shudder?
must you not shudder?
must they not shudder? 	must I not be shuddering?
must you not be shuddering?
must he not be shuddering?
must we not be shuddering?
must you not be shuddering?
must they not be shuddering? 	must I not have shuddered?
must you not have shuddered?
must he not have shuddered?
must we not have shuddered?
must you not have shuddered?
must they not have shuddered? 	must I not have been shuddering?
must you not have been shuddering?
must he not have been shuddering?
must we not have been shuddering?
must you not have been shuddering?
must they not have been shuddering?