English verb conjugation
WILL STIFFEN

Regular verb: stiffen - stiffened - stiffened

Affirmation

Simple form	V-ing form
I'll stiffen you'll stiffen she'll stiffen we'll stiffen you'll stiffen they'll stiffen	I'll be stiffening you'll be stiffening she'll be stiffening we'll be stiffening you'll be stiffening they'll be stiffening
Perfect	V-ing perfect
I'll have stiffened you'll have stiffened she'll have stiffened we'll have stiffened you'll have stiffened they'll have stiffened	I'll have been stiffening you'll have been stiffening she'll have been stiffening we'll have been stiffening you'll have been stiffening they'll have been stiffening

Negation

Simple form	V-ing form
I won't stiffen you won't stiffen she won't stiffen we won't stiffen you won't stiffen they won't stiffen	I won't be stiffening you won't be stiffening she won't be stiffening we won't be stiffening you won't be stiffening they won't be stiffening
Perfect	V-ing perfect
I won't have stiffened you won't have stiffened she won't have stiffened we won't have stiffened you won't have stiffened they won't have stiffened	I won't have been stiffening you won't have been stiffening she won't have been stiffening we won't have been stiffening you won't have been stiffening they won't have been stiffening

Interrogative form

Simple form	V-ing form
will I stiffen? will you stiffen? will she stiffen? will we stiffen? will you stiffen? will they stiffen?	will I be stiffening? will you be stiffening? will she be stiffening? will we be stiffening? will you be stiffening? will they be stiffening?
Perfect	V-ing perfect
will I have stiffened? will you have stiffened? will she have stiffened? will we have stiffened? will you have stiffened? will they have stiffened?	will I have been stiffening? will you have been stiffening? will she have been stiffening? will we have been stiffening? will you have been stiffening? will they have been stiffening?

Interro-negative form

Simple form	V-ing form
won't I stiffen? won't you stiffen? won't she stiffen? won't we stiffen? won't you stiffen? won't they stiffen?	won't I be stiffening? won't you be stiffening? won't she be stiffening? won't we be stiffening? won't you be stiffening? won't they be stiffening?
Perfect	V-ing perfect
won't I have stiffened? won't you have stiffened? won't she have stiffened? won't we have stiffened? won't you have stiffened? won't they have stiffened?	won't I have been stiffening? won't you have been stiffening? won't she have been stiffening? won't we have been stiffening? won't you have been stiffening? won't they have been stiffening?