Conjugaison du verbe anglais
MUST RIFF

Verbe régulier : riff - riffed - riffed

Affirmation

Forme simple	Forme en V-ing
I must riff you must riff he must riff we must riff you must riff they must riff	I must be riffing you must be riffing he must be riffing we must be riffing you must be riffing they must be riffing
Perfect	Perfect en V-ing
I must have riffed you must have riffed he must have riffed we must have riffed you must have riffed they must have riffed	I must have been riffing you must have been riffing he must have been riffing we must have been riffing you must have been riffing they must have been riffing

Négation

Forme simple	Forme en V-ing
I mustn't riff you mustn't riff he mustn't riff we mustn't riff you mustn't riff they mustn't riff	I mustn't be riffing you mustn't be riffing he mustn't be riffing we mustn't be riffing you mustn't be riffing they mustn't be riffing
Perfect	Perfect en V-ing
I mustn't have riffed you mustn't have riffed he mustn't have riffed we mustn't have riffed you mustn't have riffed they mustn't have riffed	I mustn't have been riffing you mustn't have been riffing he mustn't have been riffing we mustn't have been riffing you mustn't have been riffing they mustn't have been riffing

Forme interrogative

Forme simple	Forme en V-ing
must I riff? must you riff? must he riff? must we riff? must you riff? must they riff?	must I be riffing? must you be riffing? must he be riffing? must we be riffing? must you be riffing? must they be riffing?
Perfect	Perfect en V-ing
must I have riffed? must you have riffed? must he have riffed? must we have riffed? must you have riffed? must they have riffed?	must I have been riffing? must you have been riffing? must he have been riffing? must we have been riffing? must you have been riffing? must they have been riffing?

Forme interro-négative

Forme simple	Forme en V-ing
mustn't I riff? mustn't you riff? mustn't he riff? mustn't we riff? mustn't you riff? mustn't they riff?	mustn't I be riffing? mustn't you be riffing? mustn't he be riffing? mustn't we be riffing? mustn't you be riffing? mustn't they be riffing?
Perfect	Perfect en V-ing
mustn't I have riffed? mustn't you have riffed? mustn't he have riffed? mustn't we have riffed? mustn't you have riffed? mustn't they have riffed?	mustn't I have been riffing? mustn't you have been riffing? mustn't he have been riffing? mustn't we have been riffing? mustn't you have been riffing? mustn't they have been riffing?