English verb conjugation
CAN DECUPLE

Regular verb: decuple - decupled - decupled

Affirmation

Simple form	V-ing form
I can decuple you can decuple he can decuple we can decuple you can decuple they can decuple	I can be decupling you can be decupling he can be decupling we can be decupling you can be decupling they can be decupling
Perfect	V-ing perfect
I can have decupled you can have decupled he can have decupled we can have decupled you can have decupled they can have decupled	I can have been decupling you can have been decupling he can have been decupling we can have been decupling you can have been decupling they can have been decupling

Negation

Simple form	V-ing form
I can't decuple you can't decuple he can't decuple we can't decuple you can't decuple they can't decuple	I can't be decupling you can't be decupling he can't be decupling we can't be decupling you can't be decupling they can't be decupling
Perfect	V-ing perfect
I can't have decupled you can't have decupled he can't have decupled we can't have decupled you can't have decupled they can't have decupled	I can't have been decupling you can't have been decupling he can't have been decupling we can't have been decupling you can't have been decupling they can't have been decupling

Interrogative form

Simple form	V-ing form
can I decuple? can you decuple? can he decuple? can we decuple? can you decuple? can they decuple?	can I be decupling? can you be decupling? can he be decupling? can we be decupling? can you be decupling? can they be decupling?
Perfect	V-ing perfect
can I have decupled? can you have decupled? can he have decupled? can we have decupled? can you have decupled? can they have decupled?	can I have been decupling? can you have been decupling? can he have been decupling? can we have been decupling? can you have been decupling? can they have been decupling?

Interro-negative form

Simple form	V-ing form
can't I decuple? can't you decuple? can't he decuple? can't we decuple? can't you decuple? can't they decuple?	can't I be decupling? can't you be decupling? can't he be decupling? can't we be decupling? can't you be decupling? can't they be decupling?
Perfect	V-ing perfect
can't I have decupled? can't you have decupled? can't he have decupled? can't we have decupled? can't you have decupled? can't they have decupled?	can't I have been decupling? can't you have been decupling? can't he have been decupling? can't we have been decupling? can't you have been decupling? can't they have been decupling?