I'd be decupling you'd be decupling he'd be decupling we'd be decupling you'd be decupling they'd be decupling
Perfect
I should've decupled you should've decupled he should've decupled we should've decupled you should've decupled they should've decupled
V-ing perfect
I should've been decupling you should've been decupling he should've been decupling we should've been decupling you should've been decupling they should've been decupling
Negation
Simple form
I shouldn't decuple you shouldn't decuple he shouldn't decuple we shouldn't decuple you shouldn't decuple they shouldn't decuple
V-ing form
I shouldn't be decupling you shouldn't be decupling he shouldn't be decupling we shouldn't be decupling you shouldn't be decupling they shouldn't be decupling
Perfect
I shouldn't have decupled you shouldn't have decupled he shouldn't have decupled we shouldn't have decupled you shouldn't have decupled they shouldn't have decupled
V-ing perfect
I shouldn't have been decupling you shouldn't have been decupling he shouldn't have been decupling we shouldn't have been decupling you shouldn't have been decupling they shouldn't have been decupling
Interrogative form
Simple form
should I decuple? should you decuple? should he decuple? should we decuple? should you decuple? should they decuple?
V-ing form
should I be decupling? should you be decupling? should he be decupling? should we be decupling? should you be decupling? should they be decupling?
Perfect
should I have decupled? should you have decupled? should he have decupled? should we have decupled? should you have decupled? should they have decupled?
V-ing perfect
should I have been decupling? should you have been decupling? should he have been decupling? should we have been decupling? should you have been decupling? should they have been decupling?
Interro-negative form
Simple form
shouldn't I decuple? shouldn't you decuple? shouldn't he decuple? shouldn't we decuple? shouldn't you decuple? shouldn't they decuple?
V-ing form
shouldn't I be decupling? shouldn't you be decupling? shouldn't he be decupling? shouldn't we be decupling? shouldn't you be decupling? shouldn't they be decupling?
Perfect
shouldn't I have decupled? shouldn't you have decupled? shouldn't he have decupled? shouldn't we have decupled? shouldn't you have decupled? shouldn't they have decupled?
V-ing perfect
shouldn't I have been decupling? shouldn't you have been decupling? shouldn't he have been decupling? shouldn't we have been decupling? shouldn't you have been decupling? shouldn't they have been decupling?