should riff
Verbe régulier : riff - riffed- riffed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should riff
you should riff
she should riff
we should riff
you should riff
they should riff 	I should be riffing
you should be riffing
she should be riffing
we should be riffing
you should be riffing
they should be riffing	I should have riffed
you should have riffed
she should have riffed
we should have riffed
you should have riffed
they should have riffed	I should have been riffing
you should have been riffing
she should have been riffing
we should have been riffing
you should have been riffing
they should have been riffing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should not riff
you should not riff
she should not riff
we should not riff
you should not riff
they should not riff 	I should not be riffing
you should not be riffing
she should not be riffing
we should not be riffing
you should not be riffing
they should not be riffing	I should not have riffed
you should not have riffed
she should not have riffed
we should not have riffed
you should not have riffed
they should not have riffed	I should not have been riffing
you should not have been riffing
she should not have been riffing
we should not have been riffing
you should not have been riffing
they should not have been riffing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I riff?
should you riff?
should she riff?
should we riff?
should you riff?
should they riff? 	should I be riffing?
should you be riffing?
should she be riffing?
should we be riffing?
should you be riffing?
should they be riffing? 	should I have riffed?
should you have riffed?
should she have riffed?
should we have riffed?
should you have riffed?
should they have riffed? 	should I have been riffing?
should you have been riffing?
should she have been riffing?
should we have been riffing?
should you have been riffing?
should they have been riffing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I not riff?
should you not riff?
should she not riff?
should we not riff?
should you not riff?
should they not riff? 	should I not be riffing?
should you not be riffing?
should she not be riffing?
should we not be riffing?
should you not be riffing?
should they not be riffing? 	should I not have riffed?
should you not have riffed?
should she not have riffed?
should we not have riffed?
should you not have riffed?
should they not have riffed? 	should I not have been riffing?
should you not have been riffing?
should she not have been riffing?
should we not have been riffing?
should you not have been riffing?
should they not have been riffing?