English verb conjugation
SHALL RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form	V-ing form
I'll riff you'll riff he'll riff we'll riff you'll riff they'll riff	I'll be riffing you'll be riffing he'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 he'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 he'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 he 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 he 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 he 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 he 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 he riff? shall we riff? shall you riff? shall they riff?	shall I be riffing? shall you be riffing? shall he 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 he 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 he 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 he 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 he 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 he 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 he have been riffing? shan't we have been riffing? shan't you have been riffing? shan't they have been riffing?