I can prevent you can prevent he can prevent we can prevent you can prevent they can prevent
Forme en V-ing
I can be preventing you can be preventing he can be preventing we can be preventing you can be preventing they can be preventing
Perfect
I can have prevented you can have prevented he can have prevented we can have prevented you can have prevented they can have prevented
Perfect en V-ing
I can have been preventing you can have been preventing he can have been preventing we can have been preventing you can have been preventing they can have been preventing
Négation
Forme simple
I can't prevent you can't prevent he can't prevent we can't prevent you can't prevent they can't prevent
Forme en V-ing
I can't be preventing you can't be preventing he can't be preventing we can't be preventing you can't be preventing they can't be preventing
Perfect
I can't have prevented you can't have prevented he can't have prevented we can't have prevented you can't have prevented they can't have prevented
Perfect en V-ing
I can't have been preventing you can't have been preventing he can't have been preventing we can't have been preventing you can't have been preventing they can't have been preventing
Forme interrogative
Forme simple
can I prevent? can you prevent? can he prevent? can we prevent? can you prevent? can they prevent?
Forme en V-ing
can I be preventing? can you be preventing? can he be preventing? can we be preventing? can you be preventing? can they be preventing?
Perfect
can I have prevented? can you have prevented? can he have prevented? can we have prevented? can you have prevented? can they have prevented?
Perfect en V-ing
can I have been preventing? can you have been preventing? can he have been preventing? can we have been preventing? can you have been preventing? can they have been preventing?
Forme interro-négative
Forme simple
can't I prevent? can't you prevent? can't he prevent? can't we prevent? can't you prevent? can't they prevent?
Forme en V-ing
can't I be preventing? can't you be preventing? can't he be preventing? can't we be preventing? can't you be preventing? can't they be preventing?
Perfect
can't I have prevented? can't you have prevented? can't he have prevented? can't we have prevented? can't you have prevented? can't they have prevented?
Perfect en V-ing
can't I have been preventing? can't you have been preventing? can't he have been preventing? can't we have been preventing? can't you have been preventing? can't they have been preventing?