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 must not harshen you must not harshen he must not harshen we must not harshen you must not harshen they must not harshen
Forme en V-ing
I must not be harshening you must not be harshening he must not be harshening we must not be harshening you must not be harshening they must not be harshening
Perfect
I must not have harshened you must not have harshened he must not have harshened we must not have harshened you must not have harshened they must not have harshened
Perfect en V-ing
I must not have been harshening you must not have been harshening he must not have been harshening we must not have been harshening you must not have been harshening they must not 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
must I not harshen? must you not harshen? must he not harshen? must we not harshen? must you not harshen? must they not harshen?
Forme en V-ing
must I not be harshening? must you not be harshening? must he not be harshening? must we not be harshening? must you not be harshening? must they not be harshening?
Perfect
must I not have harshened? must you not have harshened? must he not have harshened? must we not have harshened? must you not have harshened? must they not have harshened?
Perfect en V-ing
must I not have been harshening? must you not have been harshening? must he not have been harshening? must we not have been harshening? must you not have been harshening? must they not have been harshening?