English verb conjugation
CAN QUADRUPLE

Regular verb: quadruple - quadrupled - quadrupled

Affirmation

Simple form	V-ing form
I can quadruple you can quadruple he can quadruple we can quadruple you can quadruple they can quadruple	I can be quadrupling you can be quadrupling he can be quadrupling we can be quadrupling you can be quadrupling they can be quadrupling
Perfect	V-ing perfect
I can have quadrupled you can have quadrupled he can have quadrupled we can have quadrupled you can have quadrupled they can have quadrupled	I can have been quadrupling you can have been quadrupling he can have been quadrupling we can have been quadrupling you can have been quadrupling they can have been quadrupling

Negation

Simple form	V-ing form
I can't quadruple you can't quadruple he can't quadruple we can't quadruple you can't quadruple they can't quadruple	I can't be quadrupling you can't be quadrupling he can't be quadrupling we can't be quadrupling you can't be quadrupling they can't be quadrupling
Perfect	V-ing perfect
I can't have quadrupled you can't have quadrupled he can't have quadrupled we can't have quadrupled you can't have quadrupled they can't have quadrupled	I can't have been quadrupling you can't have been quadrupling he can't have been quadrupling we can't have been quadrupling you can't have been quadrupling they can't have been quadrupling

Interrogative form

Simple form	V-ing form
can I quadruple? can you quadruple? can he quadruple? can we quadruple? can you quadruple? can they quadruple?	can I be quadrupling? can you be quadrupling? can he be quadrupling? can we be quadrupling? can you be quadrupling? can they be quadrupling?
Perfect	V-ing perfect
can I have quadrupled? can you have quadrupled? can he have quadrupled? can we have quadrupled? can you have quadrupled? can they have quadrupled?	can I have been quadrupling? can you have been quadrupling? can he have been quadrupling? can we have been quadrupling? can you have been quadrupling? can they have been quadrupling?

Interro-negative form

Simple form	V-ing form
can't I quadruple? can't you quadruple? can't he quadruple? can't we quadruple? can't you quadruple? can't they quadruple?	can't I be quadrupling? can't you be quadrupling? can't he be quadrupling? can't we be quadrupling? can't you be quadrupling? can't they be quadrupling?
Perfect	V-ing perfect
can't I have quadrupled? can't you have quadrupled? can't he have quadrupled? can't we have quadrupled? can't you have quadrupled? can't they have quadrupled?	can't I have been quadrupling? can't you have been quadrupling? can't he have been quadrupling? can't we have been quadrupling? can't you have been quadrupling? can't they have been quadrupling?