I can prevent you can prevent she can prevent we can prevent you can prevent they can prevent
Forme en V-ing
I can be preventing you can be preventing she can be preventing we can be preventing you can be preventing they can be preventing
Perfect
I can have prevented you can have prevented she 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 she can have been preventing we can have been preventing you can have been preventing they can have been preventing
Négation
Forme simple
I cannot prevent you cannot prevent she cannot prevent we cannot prevent you cannot prevent they cannot prevent
Forme en V-ing
I cannot be preventing you cannot be preventing she cannot be preventing we cannot be preventing you cannot be preventing they cannot be preventing
Perfect
I cannot have prevented you cannot have prevented she cannot have prevented we cannot have prevented you cannot have prevented they cannot have prevented
Perfect en V-ing
I cannot have been preventing you cannot have been preventing she cannot have been preventing we cannot have been preventing you cannot have been preventing they cannot have been preventing
Forme interrogative
Forme simple
can I prevent? can you prevent? can she prevent? can we prevent? can you prevent? can they prevent?
Forme en V-ing
can I be preventing? can you be preventing? can she be preventing? can we be preventing? can you be preventing? can they be preventing?
Perfect
can I have prevented? can you have prevented? can she 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 she have been preventing? can we have been preventing? can you have been preventing? can they have been preventing?
Forme interro-négative
Forme simple
can I not prevent? can you not prevent? can she not prevent? can we not prevent? can you not prevent? can they not prevent?
Forme en V-ing
can I not be preventing? can you not be preventing? can she not be preventing? can we not be preventing? can you not be preventing? can they not be preventing?
Perfect
can I not have prevented? can you not have prevented? can she not have prevented? can we not have prevented? can you not have prevented? can they not have prevented?
Perfect en V-ing
can I not have been preventing? can you not have been preventing? can she not have been preventing? can we not have been preventing? can you not have been preventing? can they not have been preventing?