must refridgerate
Verbo regular: refridgerate - refridgerated- refridgerated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must refridgerate
you must refridgerate
he must refridgerate
we must refridgerate
you must refridgerate
they must refridgerate 	I must be refridgerating
you must be refridgerating
he must be refridgerating
we must be refridgerating
you must be refridgerating
they must be refridgerating	I must have refridgerated
you must have refridgerated
he must have refridgerated
we must have refridgerated
you must have refridgerated
they must have refridgerated	I must have been refridgerating
you must have been refridgerating
he must have been refridgerating
we must have been refridgerating
you must have been refridgerating
they must have been refridgerating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't refridgerate
you mustn't refridgerate
he mustn't refridgerate
we mustn't refridgerate
you mustn't refridgerate
they mustn't refridgerate 	I mustn't be refridgerating
you mustn't be refridgerating
he mustn't be refridgerating
we mustn't be refridgerating
you mustn't be refridgerating
they mustn't be refridgerating	I mustn't have refridgerated
you mustn't have refridgerated
he mustn't have refridgerated
we mustn't have refridgerated
you mustn't have refridgerated
they mustn't have refridgerated	I mustn't have been refridgerating
you mustn't have been refridgerating
he mustn't have been refridgerating
we mustn't have been refridgerating
you mustn't have been refridgerating
they mustn't have been refridgerating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I refridgerate?
must you refridgerate?
must he refridgerate?
must we refridgerate?
must you refridgerate?
must they refridgerate? 	must I be refridgerating?
must you be refridgerating?
must he be refridgerating?
must we be refridgerating?
must you be refridgerating?
must they be refridgerating? 	must I have refridgerated?
must you have refridgerated?
must he have refridgerated?
must we have refridgerated?
must you have refridgerated?
must they have refridgerated? 	must I have been refridgerating?
must you have been refridgerating?
must he have been refridgerating?
must we have been refridgerating?
must you have been refridgerating?
must they have been refridgerating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I refridgerate?
mustn't you refridgerate?
mustn't he refridgerate?
mustn't we refridgerate?
mustn't you refridgerate?
mustn't they refridgerate? 	mustn't I be refridgerating?
mustn't you be refridgerating?
mustn't he be refridgerating?
mustn't we be refridgerating?
mustn't you be refridgerating?
mustn't they be refridgerating? 	mustn't I have refridgerated?
mustn't you have refridgerated?
mustn't he have refridgerated?
mustn't we have refridgerated?
mustn't you have refridgerated?
mustn't they have refridgerated? 	mustn't I have been refridgerating?
mustn't you have been refridgerating?
mustn't he have been refridgerating?
mustn't we have been refridgerating?
mustn't you have been refridgerating?
mustn't they have been refridgerating?