I can quadruple you can quadruple he can quadruple we can quadruple you can quadruple they can quadruple
Forme en V-ing
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
I can have quadrupled you can have quadrupled he can have quadrupled we can have quadrupled you can have quadrupled they can have quadrupled
Perfect en V-ing
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
Négation
Forme simple
I can't quadruple you can't quadruple he can't quadruple we can't quadruple you can't quadruple they can't quadruple
Forme en V-ing
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
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
Perfect en V-ing
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
Forme interrogative
Forme simple
can I quadruple? can you quadruple? can he quadruple? can we quadruple? can you quadruple? can they quadruple?
Forme en V-ing
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
can I have quadrupled? can you have quadrupled? can he have quadrupled? can we have quadrupled? can you have quadrupled? can they have quadrupled?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
can't I quadruple? can't you quadruple? can't he quadruple? can't we quadruple? can't you quadruple? can't they quadruple?
Forme en V-ing
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
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?
Perfect en V-ing
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?