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