English verb conjugation
SHALL STIFF

Regular verb: stiff - stiffed - stiffed

Affirmation

Simple form	V-ing form
I'll stiff you'll stiff she'll stiff we'll stiff you'll stiff they'll stiff	I'll be stiffing you'll be stiffing she'll be stiffing we'll be stiffing you'll be stiffing they'll be stiffing
Perfect	V-ing perfect
I'll have stiffed you'll have stiffed she'll have stiffed we'll have stiffed you'll have stiffed they'll have stiffed	I'll have been stiffing you'll have been stiffing she'll have been stiffing we'll have been stiffing you'll have been stiffing they'll have been stiffing

Negation

Simple form	V-ing form
I shan't stiff you shan't stiff she shan't stiff we shan't stiff you shan't stiff they shan't stiff	I shan't be stiffing you shan't be stiffing she shan't be stiffing we shan't be stiffing you shan't be stiffing they shan't be stiffing
Perfect	V-ing perfect
I shan't have stiffed you shan't have stiffed she shan't have stiffed we shan't have stiffed you shan't have stiffed they shan't have stiffed	I shan't have been stiffing you shan't have been stiffing she shan't have been stiffing we shan't have been stiffing you shan't have been stiffing they shan't have been stiffing

Interrogative form

Simple form	V-ing form
shall I stiff? shall you stiff? shall she stiff? shall we stiff? shall you stiff? shall they stiff?	shall I be stiffing? shall you be stiffing? shall she be stiffing? shall we be stiffing? shall you be stiffing? shall they be stiffing?
Perfect	V-ing perfect
shall I have stiffed? shall you have stiffed? shall she have stiffed? shall we have stiffed? shall you have stiffed? shall they have stiffed?	shall I have been stiffing? shall you have been stiffing? shall she have been stiffing? shall we have been stiffing? shall you have been stiffing? shall they have been stiffing?

Interro-negative form

Simple form	V-ing form
shan't I stiff? shan't you stiff? shan't she stiff? shan't we stiff? shan't you stiff? shan't they stiff?	shan't I be stiffing? shan't you be stiffing? shan't she be stiffing? shan't we be stiffing? shan't you be stiffing? shan't they be stiffing?
Perfect	V-ing perfect
shan't I have stiffed? shan't you have stiffed? shan't she have stiffed? shan't we have stiffed? shan't you have stiffed? shan't they have stiffed?	shan't I have been stiffing? shan't you have been stiffing? shan't she have been stiffing? shan't we have been stiffing? shan't you have been stiffing? shan't they have been stiffing?