I must restrict you must restrict he must restrict we must restrict you must restrict they must restrict
V-ing form
I must be restricting you must be restricting he must be restricting we must be restricting you must be restricting they must be restricting
Perfect
I must have restricted you must have restricted he must have restricted we must have restricted you must have restricted they must have restricted
V-ing perfect
I must have been restricting you must have been restricting he must have been restricting we must have been restricting you must have been restricting they must have been restricting
Negation
Simple form
I mustn't restrict you mustn't restrict he mustn't restrict we mustn't restrict you mustn't restrict they mustn't restrict
V-ing form
I mustn't be restricting you mustn't be restricting he mustn't be restricting we mustn't be restricting you mustn't be restricting they mustn't be restricting
Perfect
I mustn't have restricted you mustn't have restricted he mustn't have restricted we mustn't have restricted you mustn't have restricted they mustn't have restricted
V-ing perfect
I mustn't have been restricting you mustn't have been restricting he mustn't have been restricting we mustn't have been restricting you mustn't have been restricting they mustn't have been restricting
Interrogative form
Simple form
must I restrict? must you restrict? must he restrict? must we restrict? must you restrict? must they restrict?
V-ing form
must I be restricting? must you be restricting? must he be restricting? must we be restricting? must you be restricting? must they be restricting?
Perfect
must I have restricted? must you have restricted? must he have restricted? must we have restricted? must you have restricted? must they have restricted?
V-ing perfect
must I have been restricting? must you have been restricting? must he have been restricting? must we have been restricting? must you have been restricting? must they have been restricting?
Interro-negative form
Simple form
mustn't I restrict? mustn't you restrict? mustn't he restrict? mustn't we restrict? mustn't you restrict? mustn't they restrict?
V-ing form
mustn't I be restricting? mustn't you be restricting? mustn't he be restricting? mustn't we be restricting? mustn't you be restricting? mustn't they be restricting?
Perfect
mustn't I have restricted? mustn't you have restricted? mustn't he have restricted? mustn't we have restricted? mustn't you have restricted? mustn't they have restricted?
V-ing perfect
mustn't I have been restricting? mustn't you have been restricting? mustn't he have been restricting? mustn't we have been restricting? mustn't you have been restricting? mustn't they have been restricting?