English verb conjugation
SHALL RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form	V-ing form
I'll riff you'll riff she'll riff we'll riff you'll riff they'll riff	I'll be riffing you'll be riffing she'll be riffing we'll be riffing you'll be riffing they'll be riffing
Perfect	V-ing perfect
I'll have riffed you'll have riffed she'll have riffed we'll have riffed you'll have riffed they'll have riffed	I'll have been riffing you'll have been riffing she'll have been riffing we'll have been riffing you'll have been riffing they'll have been riffing

Negation

Simple form	V-ing form
I shan't riff you shan't riff she shan't riff we shan't riff you shan't riff they shan't riff	I shan't be riffing you shan't be riffing she shan't be riffing we shan't be riffing you shan't be riffing they shan't be riffing
Perfect	V-ing perfect
I shan't have riffed you shan't have riffed she shan't have riffed we shan't have riffed you shan't have riffed they shan't have riffed	I shan't have been riffing you shan't have been riffing she shan't have been riffing we shan't have been riffing you shan't have been riffing they shan't have been riffing

Interrogative form

Simple form	V-ing form
shall I riff? shall you riff? shall she riff? shall we riff? shall you riff? shall they riff?	shall I be riffing? shall you be riffing? shall she be riffing? shall we be riffing? shall you be riffing? shall they be riffing?
Perfect	V-ing perfect
shall I have riffed? shall you have riffed? shall she have riffed? shall we have riffed? shall you have riffed? shall they have riffed?	shall I have been riffing? shall you have been riffing? shall she have been riffing? shall we have been riffing? shall you have been riffing? shall they have been riffing?

Interro-negative form

Simple form	V-ing form
shan't I riff? shan't you riff? shan't she riff? shan't we riff? shan't you riff? shan't they riff?	shan't I be riffing? shan't you be riffing? shan't she be riffing? shan't we be riffing? shan't you be riffing? shan't they be riffing?
Perfect	V-ing perfect
shan't I have riffed? shan't you have riffed? shan't she have riffed? shan't we have riffed? shan't you have riffed? shan't they have riffed?	shan't I have been riffing? shan't you have been riffing? shan't she have been riffing? shan't we have been riffing? shan't you have been riffing? shan't they have been riffing?