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