I could scrummage you could scrummage he could scrummage we could scrummage you could scrummage they could scrummage
V-ing form
I could be scrummaging you could be scrummaging he could be scrummaging we could be scrummaging you could be scrummaging they could be scrummaging
Perfect
I could have scrummaged you could have scrummaged he could have scrummaged we could have scrummaged you could have scrummaged they could have scrummaged
V-ing perfect
I could have been scrummaging you could have been scrummaging he could have been scrummaging we could have been scrummaging you could have been scrummaging they could have been scrummaging
Negation
Simple form
I could not scrummage you could not scrummage he could not scrummage we could not scrummage you could not scrummage they could not scrummage
V-ing form
I could not be scrummaging you could not be scrummaging he could not be scrummaging we could not be scrummaging you could not be scrummaging they could not be scrummaging
Perfect
I could not have scrummaged you could not have scrummaged he could not have scrummaged we could not have scrummaged you could not have scrummaged they could not have scrummaged
V-ing perfect
I could not have been scrummaging you could not have been scrummaging he could not have been scrummaging we could not have been scrummaging you could not have been scrummaging they could not have been scrummaging
Interrogative form
Simple form
could I scrummage? could you scrummage? could he scrummage? could we scrummage? could you scrummage? could they scrummage?
V-ing form
could I be scrummaging? could you be scrummaging? could he be scrummaging? could we be scrummaging? could you be scrummaging? could they be scrummaging?
Perfect
could I have scrummaged? could you have scrummaged? could he have scrummaged? could we have scrummaged? could you have scrummaged? could they have scrummaged?
V-ing perfect
could I have been scrummaging? could you have been scrummaging? could he have been scrummaging? could we have been scrummaging? could you have been scrummaging? could they have been scrummaging?
Interro-negative form
Simple form
could I not scrummage? could you not scrummage? could he not scrummage? could we not scrummage? could you not scrummage? could they not scrummage?
V-ing form
could I not be scrummaging? could you not be scrummaging? could he not be scrummaging? could we not be scrummaging? could you not be scrummaging? could they not be scrummaging?
Perfect
could I not have scrummaged? could you not have scrummaged? could he not have scrummaged? could we not have scrummaged? could you not have scrummaged? could they not have scrummaged?
V-ing perfect
could I not have been scrummaging? could you not have been scrummaging? could he not have been scrummaging? could we not have been scrummaging? could you not have been scrummaging? could they not have been scrummaging?