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