I must harden you must harden he must harden we must harden you must harden they must harden
Forme en V-ing
I must be hardening you must be hardening he must be hardening we must be hardening you must be hardening they must be hardening
Perfect
I must have hardened you must have hardened he must have hardened we must have hardened you must have hardened they must have hardened
Perfect en V-ing
I must have been hardening you must have been hardening he must have been hardening we must have been hardening you must have been hardening they must have been hardening
Négation
Forme simple
I must not harden you must not harden he must not harden we must not harden you must not harden they must not harden
Forme en V-ing
I must not be hardening you must not be hardening he must not be hardening we must not be hardening you must not be hardening they must not be hardening
Perfect
I must not have hardened you must not have hardened he must not have hardened we must not have hardened you must not have hardened they must not have hardened
Perfect en V-ing
I must not have been hardening you must not have been hardening he must not have been hardening we must not have been hardening you must not have been hardening they must not have been hardening
Forme interrogative
Forme simple
must I harden? must you harden? must he harden? must we harden? must you harden? must they harden?
Forme en V-ing
must I be hardening? must you be hardening? must he be hardening? must we be hardening? must you be hardening? must they be hardening?
Perfect
must I have hardened? must you have hardened? must he have hardened? must we have hardened? must you have hardened? must they have hardened?
Perfect en V-ing
must I have been hardening? must you have been hardening? must he have been hardening? must we have been hardening? must you have been hardening? must they have been hardening?
Forme interro-négative
Forme simple
must I not harden? must you not harden? must he not harden? must we not harden? must you not harden? must they not harden?
Forme en V-ing
must I not be hardening? must you not be hardening? must he not be hardening? must we not be hardening? must you not be hardening? must they not be hardening?
Perfect
must I not have hardened? must you not have hardened? must he not have hardened? must we not have hardened? must you not have hardened? must they not have hardened?
Perfect en V-ing
must I not have been hardening? must you not have been hardening? must he not have been hardening? must we not have been hardening? must you not have been hardening? must they not have been hardening?