English verb conjugation
SHALL TOUGHEN

Regular verb: toughen - toughened - toughened

Affirmation

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