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 cannot decuple you cannot decuple he cannot decuple we cannot decuple you cannot decuple they cannot decuple	I cannot be decupling you cannot be decupling he cannot be decupling we cannot be decupling you cannot be decupling they cannot be decupling
Perfect	V-ing perfect
I cannot have decupled you cannot have decupled he cannot have decupled we cannot have decupled you cannot have decupled they cannot have decupled	I cannot have been decupling you cannot have been decupling he cannot have been decupling we cannot have been decupling you cannot have been decupling they cannot 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 I not decuple? can you not decuple? can he not decuple? can we not decuple? can you not decuple? can they not decuple?	can I not be decupling? can you not be decupling? can he not be decupling? can we not be decupling? can you not be decupling? can they not be decupling?
Perfect	V-ing perfect
can I not have decupled? can you not have decupled? can he not have decupled? can we not have decupled? can you not have decupled? can they not have decupled?	can I not have been decupling? can you not have been decupling? can he not have been decupling? can we not have been decupling? can you not have been decupling? can they not have been decupling?