ought to harden
Regular verb: harden - hardened- hardened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to harden
you ought to harden
he ought to harden
we ought to harden
you ought to harden
they ought to harden 	I ought to be hardening
you ought to be hardening
he ought to be hardening
we ought to be hardening
you ought to be hardening
they ought to be hardening	I ought to have hardened
you ought to have hardened
he ought to have hardened
we ought to have hardened
you ought to have hardened
they ought to have hardened	I ought to have been hardening
you ought to have been hardening
he ought to have been hardening
we ought to have been hardening
you ought to have been hardening
they ought to have been hardening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to harden
you ought not to harden
he ought not to harden
we ought not to harden
you ought not to harden
they ought not to harden 	I ought not to hardening
you ought not to hardening
he ought not to hardening
we ought not to hardening
you ought not to hardening
they ought not to hardening	I ought not to have hardened
you ought not to have hardened
he ought not to have hardened
we ought not to have hardened
you ought not to have hardened
they ought not to have hardened	I ought not to have been hardening
you ought not to have been hardening
he ought not to have been hardening
we ought not to have been hardening
you ought not to have been hardening
they ought not to have been hardening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I harden?
ought to you harden?
ought to he harden?
ought to we harden?
ought to you harden?
ought to they harden? 	ought to I be hardening?
ought to you be hardening?
ought to he be hardening?
ought to we be hardening?
ought to you be hardening?
ought to they be hardening? 	ought to I have hardened?
ought to you have hardened?
ought to he have hardened?
ought to we have hardened?
ought to you have hardened?
ought to they have hardened? 	ought to I have been hardening?
ought to you have been hardening?
ought to he have been hardening?
ought to we have been hardening?
ought to you have been hardening?
ought to they have been hardening? 	

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