I could collaborate you could collaborate she could collaborate we could collaborate you could collaborate they could collaborate
Forme en V-ing
I could be collaborating you could be collaborating she could be collaborating we could be collaborating you could be collaborating they could be collaborating
Perfect
I could have collaborated you could have collaborated she could have collaborated we could have collaborated you could have collaborated they could have collaborated
Perfect en V-ing
I could have been collaborating you could have been collaborating she could have been collaborating we could have been collaborating you could have been collaborating they could have been collaborating
Négation
Forme simple
I could not collaborate you could not collaborate she could not collaborate we could not collaborate you could not collaborate they could not collaborate
Forme en V-ing
I could not be collaborating you could not be collaborating she could not be collaborating we could not be collaborating you could not be collaborating they could not be collaborating
Perfect
I could not have collaborated you could not have collaborated she could not have collaborated we could not have collaborated you could not have collaborated they could not have collaborated
Perfect en V-ing
I could not have been collaborating you could not have been collaborating she could not have been collaborating we could not have been collaborating you could not have been collaborating they could not have been collaborating
Forme interrogative
Forme simple
could I collaborate? could you collaborate? could she collaborate? could we collaborate? could you collaborate? could they collaborate?
Forme en V-ing
could I be collaborating? could you be collaborating? could she be collaborating? could we be collaborating? could you be collaborating? could they be collaborating?
Perfect
could I have collaborated? could you have collaborated? could she have collaborated? could we have collaborated? could you have collaborated? could they have collaborated?
Perfect en V-ing
could I have been collaborating? could you have been collaborating? could she have been collaborating? could we have been collaborating? could you have been collaborating? could they have been collaborating?
Forme interro-négative
Forme simple
could I not collaborate? could you not collaborate? could she not collaborate? could we not collaborate? could you not collaborate? could they not collaborate?
Forme en V-ing
could I not be collaborating? could you not be collaborating? could she not be collaborating? could we not be collaborating? could you not be collaborating? could they not be collaborating?
Perfect
could I not have collaborated? could you not have collaborated? could she not have collaborated? could we not have collaborated? could you not have collaborated? could they not have collaborated?
Perfect en V-ing
could I not have been collaborating? could you not have been collaborating? could she not have been collaborating? could we not have been collaborating? could you not have been collaborating? could they not have been collaborating?