shall riff
Verbe régulier : riff - riffed- riffed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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	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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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	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	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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? 	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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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? 	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?