should harden
Verbo regular: harden - hardened- hardened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should harden
you should harden
he should harden
we should harden
you should harden
they should harden 	I should be hardening
you should be hardening
he should be hardening
we should be hardening
you should be hardening
they should be hardening	I should have hardened
you should have hardened
he should have hardened
we should have hardened
you should have hardened
they should have hardened	I should have been hardening
you should have been hardening
he should have been hardening
we should have been hardening
you should have been hardening
they should have been hardening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not harden
you should not harden
he should not harden
we should not harden
you should not harden
they should not harden 	I should not be hardening
you should not be hardening
he should not be hardening
we should not be hardening
you should not be hardening
they should not be hardening	I should not have hardened
you should not have hardened
he should not have hardened
we should not have hardened
you should not have hardened
they should not have hardened	I should not have been hardening
you should not have been hardening
he should not have been hardening
we should not have been hardening
you should not have been hardening
they should not have been hardening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I harden?
should you harden?
should he harden?
should we harden?
should you harden?
should they harden? 	should I be hardening?
should you be hardening?
should he be hardening?
should we be hardening?
should you be hardening?
should they be hardening? 	should I have hardened?
should you have hardened?
should he 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 he have been hardening?
should we have been hardening?
should you have been hardening?
should they have been hardening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not harden?
should you not harden?
should he not harden?
should we not harden?
should you not harden?
should they not harden? 	should I not be hardening?
should you not be hardening?
should he not be hardening?
should we not be hardening?
should you not be hardening?
should they not be hardening? 	should I not have hardened?
should you not have hardened?
should he not have hardened?
should we not have hardened?
should you not have hardened?
should they not have hardened? 	should I not have been hardening?
should you not have been hardening?
should he not have been hardening?
should we not have been hardening?
should you not have been hardening?
should they not have been hardening?