I can contest you can contest he can contest we can contest you can contest they can contest
Forme en V-ing
I can be contesting you can be contesting he can be contesting we can be contesting you can be contesting they can be contesting
Perfect
I can have contested you can have contested he can have contested we can have contested you can have contested they can have contested
Perfect en V-ing
I can have been contesting you can have been contesting he can have been contesting we can have been contesting you can have been contesting they can have been contesting
Négation
Forme simple
I cannot contest you cannot contest he cannot contest we cannot contest you cannot contest they cannot contest
Forme en V-ing
I cannot be contesting you cannot be contesting he cannot be contesting we cannot be contesting you cannot be contesting they cannot be contesting
Perfect
I cannot have contested you cannot have contested he cannot have contested we cannot have contested you cannot have contested they cannot have contested
Perfect en V-ing
I cannot have been contesting you cannot have been contesting he cannot have been contesting we cannot have been contesting you cannot have been contesting they cannot have been contesting
Forme interrogative
Forme simple
can I contest? can you contest? can he contest? can we contest? can you contest? can they contest?
Forme en V-ing
can I be contesting? can you be contesting? can he be contesting? can we be contesting? can you be contesting? can they be contesting?
Perfect
can I have contested? can you have contested? can he have contested? can we have contested? can you have contested? can they have contested?
Perfect en V-ing
can I have been contesting? can you have been contesting? can he have been contesting? can we have been contesting? can you have been contesting? can they have been contesting?
Forme interro-négative
Forme simple
can I not contest? can you not contest? can he not contest? can we not contest? can you not contest? can they not contest?
Forme en V-ing
can I not be contesting? can you not be contesting? can he not be contesting? can we not be contesting? can you not be contesting? can they not be contesting?
Perfect
can I not have contested? can you not have contested? can he not have contested? can we not have contested? can you not have contested? can they not have contested?
Perfect en V-ing
can I not have been contesting? can you not have been contesting? can he not have been contesting? can we not have been contesting? can you not have been contesting? can they not have been contesting?