I'll be backchecking you'll be backchecking he'll be backchecking we'll be backchecking you'll be backchecking they'll be backchecking
Perfect
I'll have backchecked you'll have backchecked he'll have backchecked we'll have backchecked you'll have backchecked they'll have backchecked
V-ing perfect
I'll have been backchecking you'll have been backchecking he'll have been backchecking we'll have been backchecking you'll have been backchecking they'll have been backchecking
Negation
Simple form
I shan't backcheck you shan't backcheck he shan't backcheck we shan't backcheck you shan't backcheck they shan't backcheck
V-ing form
I shan't be backchecking you shan't be backchecking he shan't be backchecking we shan't be backchecking you shan't be backchecking they shan't be backchecking
Perfect
I shan't have backchecked you shan't have backchecked he shan't have backchecked we shan't have backchecked you shan't have backchecked they shan't have backchecked
V-ing perfect
I shan't have been backchecking you shan't have been backchecking he shan't have been backchecking we shan't have been backchecking you shan't have been backchecking they shan't have been backchecking
Interrogative form
Simple form
shall I backcheck? shall you backcheck? shall he backcheck? shall we backcheck? shall you backcheck? shall they backcheck?
V-ing form
shall I be backchecking? shall you be backchecking? shall he be backchecking? shall we be backchecking? shall you be backchecking? shall they be backchecking?
Perfect
shall I have backchecked? shall you have backchecked? shall he have backchecked? shall we have backchecked? shall you have backchecked? shall they have backchecked?
V-ing perfect
shall I have been backchecking? shall you have been backchecking? shall he have been backchecking? shall we have been backchecking? shall you have been backchecking? shall they have been backchecking?
Interro-negative form
Simple form
shan't I backcheck? shan't you backcheck? shan't he backcheck? shan't we backcheck? shan't you backcheck? shan't they backcheck?
V-ing form
shan't I be backchecking? shan't you be backchecking? shan't he be backchecking? shan't we be backchecking? shan't you be backchecking? shan't they be backchecking?
Perfect
shan't I have backchecked? shan't you have backchecked? shan't he have backchecked? shan't we have backchecked? shan't you have backchecked? shan't they have backchecked?
V-ing perfect
shan't I have been backchecking? shan't you have been backchecking? shan't he have been backchecking? shan't we have been backchecking? shan't you have been backchecking? shan't they have been backchecking?