English verb conjugation
MAY HARDEN

Regular verb: harden - hardened - hardened

Affirmation

Simple form	V-ing form
I may harden you may harden he may harden we may harden you may harden they may harden	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
may I harden? may you harden? may he harden? may we harden? may you harden? may they harden?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?