English verb conjugation
MUST REFRIGERATE

Regular verb: refrigerate - refrigerated - refrigerated

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?