I must frequent you must frequent he must frequent we must frequent you must frequent they must frequent
Forme en V-ing
I must be frequenting you must be frequenting he must be frequenting we must be frequenting you must be frequenting they must be frequenting
Perfect
I must have frequented you must have frequented he must have frequented we must have frequented you must have frequented they must have frequented
Perfect en V-ing
I must have been frequenting you must have been frequenting he must have been frequenting we must have been frequenting you must have been frequenting they must have been frequenting
Négation
Forme simple
I mustn't frequent you mustn't frequent he mustn't frequent we mustn't frequent you mustn't frequent they mustn't frequent
Forme en V-ing
I mustn't be frequenting you mustn't be frequenting he mustn't be frequenting we mustn't be frequenting you mustn't be frequenting they mustn't be frequenting
Perfect
I mustn't have frequented you mustn't have frequented he mustn't have frequented we mustn't have frequented you mustn't have frequented they mustn't have frequented
Perfect en V-ing
I mustn't have been frequenting you mustn't have been frequenting he mustn't have been frequenting we mustn't have been frequenting you mustn't have been frequenting they mustn't have been frequenting
Forme interrogative
Forme simple
must I frequent? must you frequent? must he frequent? must we frequent? must you frequent? must they frequent?
Forme en V-ing
must I be frequenting? must you be frequenting? must he be frequenting? must we be frequenting? must you be frequenting? must they be frequenting?
Perfect
must I have frequented? must you have frequented? must he have frequented? must we have frequented? must you have frequented? must they have frequented?
Perfect en V-ing
must I have been frequenting? must you have been frequenting? must he have been frequenting? must we have been frequenting? must you have been frequenting? must they have been frequenting?
Forme interro-négative
Forme simple
mustn't I frequent? mustn't you frequent? mustn't he frequent? mustn't we frequent? mustn't you frequent? mustn't they frequent?
Forme en V-ing
mustn't I be frequenting? mustn't you be frequenting? mustn't he be frequenting? mustn't we be frequenting? mustn't you be frequenting? mustn't they be frequenting?
Perfect
mustn't I have frequented? mustn't you have frequented? mustn't he have frequented? mustn't we have frequented? mustn't you have frequented? mustn't they have frequented?
Perfect en V-ing
mustn't I have been frequenting? mustn't you have been frequenting? mustn't he have been frequenting? mustn't we have been frequenting? mustn't you have been frequenting? mustn't they have been frequenting?