I may harden you may harden he may harden we may harden you may harden they may harden
V-ing form
I may be hardening you may be hardening he may be hardening we may be hardening you may be hardening they may be hardening
Perfect
I may have hardened you may have hardened he may have hardened we may have hardened you may have hardened they may have hardened
V-ing perfect
I may have been hardening you may have been hardening he may have been hardening we may have been hardening you may have been hardening they may have been hardening
Negation
Simple form
I may not harden you may not harden he may not harden we may not harden you may not harden they may not harden
V-ing form
I may not be hardening you may not be hardening he may not be hardening we may not be hardening you may not be hardening they may not be hardening
Perfect
I may not have hardened you may not have hardened he may not have hardened we may not have hardened you may not have hardened they may not have hardened
V-ing perfect
I may not have been hardening you may not have been hardening he may not have been hardening we may not have been hardening you may not have been hardening they may not have been hardening
Interrogative form
Simple form
may I harden? may you harden? may he harden? may we harden? may you harden? may they harden?
V-ing form
may I be hardening? may you be hardening? may he be hardening? may we be hardening? may you be hardening? may they be hardening?
Perfect
may I have hardened? may you have hardened? may he have hardened? may we have hardened? may you have hardened? may they have hardened?
V-ing perfect
may I have been hardening? may you have been hardening? may he have been hardening? may we have been hardening? may you have been hardening? may they have been hardening?
Interro-negative form
Simple form
may I not harden? may you not harden? may he not harden? may we not harden? may you not harden? may they not harden?
V-ing form
may I not be hardening? may you not be hardening? may he not be hardening? may we not be hardening? may you not be hardening? may they not be hardening?
Perfect
may I not have hardened? may you not have hardened? may he not have hardened? may we not have hardened? may you not have hardened? may they not have hardened?
V-ing perfect
may I not have been hardening? may you not have been hardening? may he not have been hardening? may we not have been hardening? may you not have been hardening? may they not have been hardening?