Conjugaison du verbe anglais
CAN RIFF

Verbe régulier : riff - riffed - riffed

Affirmation

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

Négation

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

Forme interrogative

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

Forme interro-négative

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