English verb conjugation
SHALL RIFF

Regular verb: riff - riffed - riffed

Affirmation

Simple form	V-ing form
I shall riff you shall riff he shall riff we shall riff you shall riff they shall riff	I shall be riffing you shall be riffing he 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 he 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 he 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 he 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 he 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 he 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 he 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 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
shall I not riff? shall you not riff? shall he 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 he 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 he 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 he not have been riffing? shall we not have been riffing? shall you not have been riffing? shall they not have been riffing?