must refrigerate
Verbo regular: refrigerate - refrigerated- refrigerated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must refrigerate
you must refrigerate
he must refrigerate
we must refrigerate
you must refrigerate
they must refrigerate 	I must be refrigerating
you must be refrigerating
he must be refrigerating
we must be refrigerating
you must be refrigerating
they must be refrigerating	I must have refrigerated
you must have refrigerated
he must have refrigerated
we must have refrigerated
you must have refrigerated
they must have refrigerated	I must have been refrigerating
you must have been refrigerating
he must have been refrigerating
we must have been refrigerating
you must have been refrigerating
they must have been refrigerating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't refrigerate
you mustn't refrigerate
he mustn't refrigerate
we mustn't refrigerate
you mustn't refrigerate
they mustn't refrigerate 	I mustn't be refrigerating
you mustn't be refrigerating
he mustn't be refrigerating
we mustn't be refrigerating
you mustn't be refrigerating
they mustn't be refrigerating	I mustn't have refrigerated
you mustn't have refrigerated
he mustn't have refrigerated
we mustn't have refrigerated
you mustn't have refrigerated
they mustn't have refrigerated	I mustn't have been refrigerating
you mustn't have been refrigerating
he mustn't have been refrigerating
we mustn't have been refrigerating
you mustn't have been refrigerating
they mustn't have been refrigerating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I refrigerate?
must you refrigerate?
must he refrigerate?
must we refrigerate?
must you refrigerate?
must they refrigerate? 	must I be refrigerating?
must you be refrigerating?
must he be refrigerating?
must we be refrigerating?
must you be refrigerating?
must they be refrigerating? 	must I have refrigerated?
must you have refrigerated?
must he have refrigerated?
must we have refrigerated?
must you have refrigerated?
must they have refrigerated? 	must I have been refrigerating?
must you have been refrigerating?
must he have been refrigerating?
must we have been refrigerating?
must you have been refrigerating?
must they have been refrigerating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I refrigerate?
mustn't you refrigerate?
mustn't he refrigerate?
mustn't we refrigerate?
mustn't you refrigerate?
mustn't they refrigerate? 	mustn't I be refrigerating?
mustn't you be refrigerating?
mustn't he be refrigerating?
mustn't we be refrigerating?
mustn't you be refrigerating?
mustn't they be refrigerating? 	mustn't I have refrigerated?
mustn't you have refrigerated?
mustn't he have refrigerated?
mustn't we have refrigerated?
mustn't you have refrigerated?
mustn't they have refrigerated? 	mustn't I have been refrigerating?
mustn't you have been refrigerating?
mustn't he have been refrigerating?
mustn't we have been refrigerating?
mustn't you have been refrigerating?
mustn't they have been refrigerating?