Conjugaison du verbe anglais
COULD CONCENTER

Verbe régulier : concenter - concentered - concentered

Affirmation

Forme simple	Forme en V-ing
I could concenter you could concenter he could concenter we could concenter you could concenter they could concenter	I could be concentering you could be concentering he could be concentering we could be concentering you could be concentering they could be concentering
Perfect	Perfect en V-ing
I could have concentered you could have concentered he could have concentered we could have concentered you could have concentered they could have concentered	I could have been concentering you could have been concentering he could have been concentering we could have been concentering you could have been concentering they could have been concentering

Négation

Forme simple	Forme en V-ing
I couldn't concenter you couldn't concenter he couldn't concenter we couldn't concenter you couldn't concenter they couldn't concenter	I couldn't be concentering you couldn't be concentering he couldn't be concentering we couldn't be concentering you couldn't be concentering they couldn't be concentering
Perfect	Perfect en V-ing
I couldn't have concentered you couldn't have concentered he couldn't have concentered we couldn't have concentered you couldn't have concentered they couldn't have concentered	I couldn't have been concentering you couldn't have been concentering he couldn't have been concentering we couldn't have been concentering you couldn't have been concentering they couldn't have been concentering

Forme interrogative

Forme simple	Forme en V-ing
could I concenter? could you concenter? could he concenter? could we concenter? could you concenter? could they concenter?	could I be concentering? could you be concentering? could he be concentering? could we be concentering? could you be concentering? could they be concentering?
Perfect	Perfect en V-ing
could I have concentered? could you have concentered? could he have concentered? could we have concentered? could you have concentered? could they have concentered?	could I have been concentering? could you have been concentering? could he have been concentering? could we have been concentering? could you have been concentering? could they have been concentering?

Forme interro-négative

Forme simple	Forme en V-ing
couldn't I concenter? couldn't you concenter? couldn't he concenter? couldn't we concenter? couldn't you concenter? couldn't they concenter?	couldn't I be concentering? couldn't you be concentering? couldn't he be concentering? couldn't we be concentering? couldn't you be concentering? couldn't they be concentering?
Perfect	Perfect en V-ing
couldn't I have concentered? couldn't you have concentered? couldn't he have concentered? couldn't we have concentered? couldn't you have concentered? couldn't they have concentered?	couldn't I have been concentering? couldn't you have been concentering? couldn't he have been concentering? couldn't we have been concentering? couldn't you have been concentering? couldn't they have been concentering?