I could drum you could drum she could drum we could drum you could drum they could drum
Forma con V-ing
I could be drumming you could be drumming she could be drumming we could be drumming you could be drumming they could be drumming
Perfecto
I could have drummed you could have drummed she could have drummed we could have drummed you could have drummed they could have drummed
Perfecto con V-ing
I could have been drumming you could have been drumming she could have been drumming we could have been drumming you could have been drumming they could have been drumming
Negación
Forma simple
I could not drum you could not drum she could not drum we could not drum you could not drum they could not drum
Forma con V-ing
I could not be drumming you could not be drumming she could not be drumming we could not be drumming you could not be drumming they could not be drumming
Perfecto
I could not have drummed you could not have drummed she could not have drummed we could not have drummed you could not have drummed they could not have drummed
Perfecto con V-ing
I could not have been drumming you could not have been drumming she could not have been drumming we could not have been drumming you could not have been drumming they could not have been drumming
Forma interrogativa
Forma simple
could I drum? could you drum? could she drum? could we drum? could you drum? could they drum?
Forma con V-ing
could I be drumming? could you be drumming? could she be drumming? could we be drumming? could you be drumming? could they be drumming?
Perfecto
could I have drummed? could you have drummed? could she have drummed? could we have drummed? could you have drummed? could they have drummed?
Perfecto con V-ing
could I have been drumming? could you have been drumming? could she have been drumming? could we have been drumming? could you have been drumming? could they have been drumming?
Forma interro-negativa
Forma simple
could I not drum? could you not drum? could she not drum? could we not drum? could you not drum? could they not drum?
Forma con V-ing
could I not be drumming? could you not be drumming? could she not be drumming? could we not be drumming? could you not be drumming? could they not be drumming?
Perfecto
could I not have drummed? could you not have drummed? could she not have drummed? could we not have drummed? could you not have drummed? could they not have drummed?
Perfecto con V-ing
could I not have been drumming? could you not have been drumming? could she not have been drumming? could we not have been drumming? could you not have been drumming? could they not have been drumming?