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