I could alternate you could alternate she could alternate we could alternate you could alternate they could alternate
Forme en V-ing
I could be alternating you could be alternating she could be alternating we could be alternating you could be alternating they could be alternating
Perfect
I could have alternated you could have alternated she could have alternated we could have alternated you could have alternated they could have alternated
Perfect en V-ing
I could have been alternating you could have been alternating she could have been alternating we could have been alternating you could have been alternating they could have been alternating
Négation
Forme simple
I could not alternate you could not alternate she could not alternate we could not alternate you could not alternate they could not alternate
Forme en V-ing
I could not be alternating you could not be alternating she could not be alternating we could not be alternating you could not be alternating they could not be alternating
Perfect
I could not have alternated you could not have alternated she could not have alternated we could not have alternated you could not have alternated they could not have alternated
Perfect en V-ing
I could not have been alternating you could not have been alternating she could not have been alternating we could not have been alternating you could not have been alternating they could not have been alternating
Forme interrogative
Forme simple
could I alternate? could you alternate? could she alternate? could we alternate? could you alternate? could they alternate?
Forme en V-ing
could I be alternating? could you be alternating? could she be alternating? could we be alternating? could you be alternating? could they be alternating?
Perfect
could I have alternated? could you have alternated? could she have alternated? could we have alternated? could you have alternated? could they have alternated?
Perfect en V-ing
could I have been alternating? could you have been alternating? could she have been alternating? could we have been alternating? could you have been alternating? could they have been alternating?
Forme interro-négative
Forme simple
could I not alternate? could you not alternate? could she not alternate? could we not alternate? could you not alternate? could they not alternate?
Forme en V-ing
could I not be alternating? could you not be alternating? could she not be alternating? could we not be alternating? could you not be alternating? could they not be alternating?
Perfect
could I not have alternated? could you not have alternated? could she not have alternated? could we not have alternated? could you not have alternated? could they not have alternated?
Perfect en V-ing
could I not have been alternating? could you not have been alternating? could she not have been alternating? could we not have been alternating? could you not have been alternating? could they not have been alternating?