should harden
Regular verb: harden - hardened- hardened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd harden
you'd harden
she'd harden
we'd harden
you'd harden
they'd harden 	I'd be hardening
you'd be hardening
she'd be hardening
we'd be hardening
you'd be hardening
they'd be hardening	I should've hardened
you should've hardened
she should've hardened
we should've hardened
you should've hardened
they should've hardened	I should've been hardening
you should've been hardening
she should've been hardening
we should've been hardening
you should've been hardening
they should've been hardening	

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

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I harden?
should you harden?
should she harden?
should we harden?
should you harden?
should they harden? 	should I be hardening?
should you be hardening?
should she be hardening?
should we be hardening?
should you be hardening?
should they be hardening? 	should I have hardened?
should you have hardened?
should she have hardened?
should we have hardened?
should you have hardened?
should they have hardened? 	should I have been hardening?
should you have been hardening?
should she have been hardening?
should we have been hardening?
should you have been hardening?
should they have been hardening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I harden?
shouldn't you harden?
shouldn't she harden?
shouldn't we harden?
shouldn't you harden?
shouldn't they harden? 	shouldn't I be hardening?
shouldn't you be hardening?
shouldn't she be hardening?
shouldn't we be hardening?
shouldn't you be hardening?
shouldn't they be hardening? 	shouldn't I have hardened?
shouldn't you have hardened?
shouldn't she have hardened?
shouldn't we have hardened?
shouldn't you have hardened?
shouldn't they have hardened? 	shouldn't I have been hardening?
shouldn't you have been hardening?
shouldn't she have been hardening?
shouldn't we have been hardening?
shouldn't you have been hardening?
shouldn't they have been hardening?