I'll be double-checking you'll be double-checking he'll be double-checking we'll be double-checking you'll be double-checking they'll be double-checking
Perfect
I'll have double-checked you'll have double-checked he'll have double-checked we'll have double-checked you'll have double-checked they'll have double-checked
V-ing perfect
I'll have been double-checking you'll have been double-checking he'll have been double-checking we'll have been double-checking you'll have been double-checking they'll have been double-checking
Negation
Simple form
I shan't double-check you shan't double-check he shan't double-check we shan't double-check you shan't double-check they shan't double-check
V-ing form
I shan't be double-checking you shan't be double-checking he shan't be double-checking we shan't be double-checking you shan't be double-checking they shan't be double-checking
Perfect
I shan't have double-checked you shan't have double-checked he shan't have double-checked we shan't have double-checked you shan't have double-checked they shan't have double-checked
V-ing perfect
I shan't have been double-checking you shan't have been double-checking he shan't have been double-checking we shan't have been double-checking you shan't have been double-checking they shan't have been double-checking
Interrogative form
Simple form
shall I double-check? shall you double-check? shall he double-check? shall we double-check? shall you double-check? shall they double-check?
V-ing form
shall I be double-checking? shall you be double-checking? shall he be double-checking? shall we be double-checking? shall you be double-checking? shall they be double-checking?
Perfect
shall I have double-checked? shall you have double-checked? shall he have double-checked? shall we have double-checked? shall you have double-checked? shall they have double-checked?
V-ing perfect
shall I have been double-checking? shall you have been double-checking? shall he have been double-checking? shall we have been double-checking? shall you have been double-checking? shall they have been double-checking?
Interro-negative form
Simple form
shan't I double-check? shan't you double-check? shan't he double-check? shan't we double-check? shan't you double-check? shan't they double-check?
V-ing form
shan't I be double-checking? shan't you be double-checking? shan't he be double-checking? shan't we be double-checking? shan't you be double-checking? shan't they be double-checking?
Perfect
shan't I have double-checked? shan't you have double-checked? shan't he have double-checked? shan't we have double-checked? shan't you have double-checked? shan't they have double-checked?
V-ing perfect
shan't I have been double-checking? shan't you have been double-checking? shan't he have been double-checking? shan't we have been double-checking? shan't you have been double-checking? shan't they have been double-checking?