English verb conjugation
SHOULD DECUPLE

Regular verb: decuple - decupled - decupled

Affirmation

Simple form	V-ing form
I'd decuple you'd decuple he'd decuple we'd decuple you'd decuple they'd decuple	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
should I decuple? should you decuple? should he decuple? should we decuple? should you decuple? should they decuple?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?