should toughen
Verbo regular: toughen - toughened- toughened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should toughen
you should toughen
he should toughen
we should toughen
you should toughen
they should toughen 	I should be toughening
you should be toughening
he should be toughening
we should be toughening
you should be toughening
they should be toughening	I should have toughened
you should have toughened
he should have toughened
we should have toughened
you should have toughened
they should have toughened	I should have been toughening
you should have been toughening
he should have been toughening
we should have been toughening
you should have been toughening
they should have been toughening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not toughen
you should not toughen
he should not toughen
we should not toughen
you should not toughen
they should not toughen 	I should not be toughening
you should not be toughening
he should not be toughening
we should not be toughening
you should not be toughening
they should not be toughening	I should not have toughened
you should not have toughened
he should not have toughened
we should not have toughened
you should not have toughened
they should not have toughened	I should not have been toughening
you should not have been toughening
he should not have been toughening
we should not have been toughening
you should not have been toughening
they should not have been toughening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I toughen?
should you toughen?
should he toughen?
should we toughen?
should you toughen?
should they toughen? 	should I be toughening?
should you be toughening?
should he be toughening?
should we be toughening?
should you be toughening?
should they be toughening? 	should I have toughened?
should you have toughened?
should he have toughened?
should we have toughened?
should you have toughened?
should they have toughened? 	should I have been toughening?
should you have been toughening?
should he have been toughening?
should we have been toughening?
should you have been toughening?
should they have been toughening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not toughen?
should you not toughen?
should he not toughen?
should we not toughen?
should you not toughen?
should they not toughen? 	should I not be toughening?
should you not be toughening?
should he not be toughening?
should we not be toughening?
should you not be toughening?
should they not be toughening? 	should I not have toughened?
should you not have toughened?
should he not have toughened?
should we not have toughened?
should you not have toughened?
should they not have toughened? 	should I not have been toughening?
should you not have been toughening?
should he not have been toughening?
should we not have been toughening?
should you not have been toughening?
should they not have been toughening?