I'll be preventing you'll be preventing she'll be preventing we'll be preventing you'll be preventing they'll be preventing
Perfect
I'll have prevented you'll have prevented she'll have prevented we'll have prevented you'll have prevented they'll have prevented
V-ing perfect
I'll have been preventing you'll have been preventing she'll have been preventing we'll have been preventing you'll have been preventing they'll have been preventing
Negation
Simple form
I shan't prevent you shan't prevent she shan't prevent we shan't prevent you shan't prevent they shan't prevent
V-ing form
I shan't be preventing you shan't be preventing she shan't be preventing we shan't be preventing you shan't be preventing they shan't be preventing
Perfect
I shan't have prevented you shan't have prevented she shan't have prevented we shan't have prevented you shan't have prevented they shan't have prevented
V-ing perfect
I shan't have been preventing you shan't have been preventing she shan't have been preventing we shan't have been preventing you shan't have been preventing they shan't have been preventing
Interrogative form
Simple form
shall I prevent? shall you prevent? shall she prevent? shall we prevent? shall you prevent? shall they prevent?
V-ing form
shall I be preventing? shall you be preventing? shall she be preventing? shall we be preventing? shall you be preventing? shall they be preventing?
Perfect
shall I have prevented? shall you have prevented? shall she have prevented? shall we have prevented? shall you have prevented? shall they have prevented?
V-ing perfect
shall I have been preventing? shall you have been preventing? shall she have been preventing? shall we have been preventing? shall you have been preventing? shall they have been preventing?
Interro-negative form
Simple form
shan't I prevent? shan't you prevent? shan't she prevent? shan't we prevent? shan't you prevent? shan't they prevent?
V-ing form
shan't I be preventing? shan't you be preventing? shan't she be preventing? shan't we be preventing? shan't you be preventing? shan't they be preventing?
Perfect
shan't I have prevented? shan't you have prevented? shan't she have prevented? shan't we have prevented? shan't you have prevented? shan't they have prevented?
V-ing perfect
shan't I have been preventing? shan't you have been preventing? shan't she have been preventing? shan't we have been preventing? shan't you have been preventing? shan't they have been preventing?