English verb conjugation
SHALL RIFF

Regular verb: riff - riffed - riffed

Affirmation

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

Negation

Simple form	V-ing form
I shall not riff you shall not riff she shall not riff we shall not riff you shall not riff they shall not riff	I shall not be riffing you shall not be riffing she shall not be riffing we shall not be riffing you shall not be riffing they shall not be riffing
Perfect	V-ing perfect
I shall not have riffed you shall not have riffed she shall not have riffed we shall not have riffed you shall not have riffed they shall not have riffed	I shall not have been riffing you shall not have been riffing she shall not have been riffing we shall not have been riffing you shall not have been riffing they shall not 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
shall I not riff? shall you not riff? shall she not riff? shall we not riff? shall you not riff? shall they not riff?	shall I not be riffing? shall you not be riffing? shall she not be riffing? shall we not be riffing? shall you not be riffing? shall they not be riffing?
Perfect	V-ing perfect
shall I not have riffed? shall you not have riffed? shall she not have riffed? shall we not have riffed? shall you not have riffed? shall they not have riffed?	shall I not have been riffing? shall you not have been riffing? shall she not have been riffing? shall we not have been riffing? shall you not have been riffing? shall they not have been riffing?