may harden
Regular verb: harden - hardened- hardened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may harden
you may harden
she may harden
we may harden
you may harden
they may harden 	I may be hardening
you may be hardening
she may be hardening
we may be hardening
you may be hardening
they may be hardening	I may have hardened
you may have hardened
she 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
she 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 	Perfect 	V-ing perfect 	
I mayn't harden
you mayn't harden
she mayn't harden
we mayn't harden
you mayn't harden
they mayn't harden 	I mayn't be hardening
you mayn't be hardening
she mayn't be hardening
we mayn't be hardening
you mayn't be hardening
they mayn't be hardening	I mayn't have hardened
you mayn't have hardened
she mayn't have hardened
we mayn't have hardened
you mayn't have hardened
they mayn't have hardened	I mayn't have been hardening
you mayn't have been hardening
she mayn't have been hardening
we mayn't have been hardening
you mayn't have been hardening
they mayn't have been hardening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I harden?
may you harden?
may she harden?
may we harden?
may you harden?
may they harden? 	may I be hardening?
may you be hardening?
may she be hardening?
may we be hardening?
may you be hardening?
may they be hardening? 	may I have hardened?
may you have hardened?
may she 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 she 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 	Perfect 	V-ing perfect 	
mayn't I harden?
mayn't you harden?
mayn't she harden?
mayn't we harden?
mayn't you harden?
mayn't they harden? 	mayn't I be hardening?
mayn't you be hardening?
mayn't she be hardening?
mayn't we be hardening?
mayn't you be hardening?
mayn't they be hardening? 	mayn't I have hardened?
mayn't you have hardened?
mayn't she have hardened?
mayn't we have hardened?
mayn't you have hardened?
mayn't they have hardened? 	mayn't I have been hardening?
mayn't you have been hardening?
mayn't she have been hardening?
mayn't we have been hardening?
mayn't you have been hardening?
mayn't they have been hardening?