shall toughen
Regular verb: toughen - toughened- toughened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall toughen
you shall toughen
she shall toughen
we shall toughen
you shall toughen
they shall toughen 	I shall be toughening
you shall be toughening
she shall be toughening
we shall be toughening
you shall be toughening
they shall be toughening	I shall have toughened
you shall have toughened
she shall have toughened
we shall have toughened
you shall have toughened
they shall have toughened	I shall have been toughening
you shall have been toughening
she shall have been toughening
we shall have been toughening
you shall have been toughening
they shall have been toughening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not toughen
you shall not toughen
she shall not toughen
we shall not toughen
you shall not toughen
they shall not toughen 	I shall not be toughening
you shall not be toughening
she shall not be toughening
we shall not be toughening
you shall not be toughening
they shall not be toughening	I shall not have toughened
you shall not have toughened
she shall not have toughened
we shall not have toughened
you shall not have toughened
they shall not have toughened	I shall not have been toughening
you shall not have been toughening
she shall not have been toughening
we shall not have been toughening
you shall not have been toughening
they shall not have been toughening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I toughen?
shall you toughen?
shall she toughen?
shall we toughen?
shall you toughen?
shall they toughen? 	shall I be toughening?
shall you be toughening?
shall she be toughening?
shall we be toughening?
shall you be toughening?
shall they be toughening? 	shall I have toughened?
shall you have toughened?
shall she have toughened?
shall we have toughened?
shall you have toughened?
shall they have toughened? 	shall I have been toughening?
shall you have been toughening?
shall she have been toughening?
shall we have been toughening?
shall you have been toughening?
shall they have been toughening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not toughen?
shall you not toughen?
shall she not toughen?
shall we not toughen?
shall you not toughen?
shall they not toughen? 	shall I not be toughening?
shall you not be toughening?
shall she not be toughening?
shall we not be toughening?
shall you not be toughening?
shall they not be toughening? 	shall I not have toughened?
shall you not have toughened?
shall she not have toughened?
shall we not have toughened?
shall you not have toughened?
shall they not have toughened? 	shall I not have been toughening?
shall you not have been toughening?
shall she not have been toughening?
shall we not have been toughening?
shall you not have been toughening?
shall they not have been toughening?