I could rummage you could rummage he could rummage we could rummage you could rummage they could rummage
V-ing form
I could be rummaging you could be rummaging he could be rummaging we could be rummaging you could be rummaging they could be rummaging
Perfect
I could have rummaged you could have rummaged he could have rummaged we could have rummaged you could have rummaged they could have rummaged
V-ing perfect
I could have been rummaging you could have been rummaging he could have been rummaging we could have been rummaging you could have been rummaging they could have been rummaging
Negation
Simple form
I couldn't rummage you couldn't rummage he couldn't rummage we couldn't rummage you couldn't rummage they couldn't rummage
V-ing form
I couldn't be rummaging you couldn't be rummaging he couldn't be rummaging we couldn't be rummaging you couldn't be rummaging they couldn't be rummaging
Perfect
I couldn't have rummaged you couldn't have rummaged he couldn't have rummaged we couldn't have rummaged you couldn't have rummaged they couldn't have rummaged
V-ing perfect
I couldn't have been rummaging you couldn't have been rummaging he couldn't have been rummaging we couldn't have been rummaging you couldn't have been rummaging they couldn't have been rummaging
Interrogative form
Simple form
could I rummage? could you rummage? could he rummage? could we rummage? could you rummage? could they rummage?
V-ing form
could I be rummaging? could you be rummaging? could he be rummaging? could we be rummaging? could you be rummaging? could they be rummaging?
Perfect
could I have rummaged? could you have rummaged? could he have rummaged? could we have rummaged? could you have rummaged? could they have rummaged?
V-ing perfect
could I have been rummaging? could you have been rummaging? could he have been rummaging? could we have been rummaging? could you have been rummaging? could they have been rummaging?
Interro-negative form
Simple form
couldn't I rummage? couldn't you rummage? couldn't he rummage? couldn't we rummage? couldn't you rummage? couldn't they rummage?
V-ing form
couldn't I be rummaging? couldn't you be rummaging? couldn't he be rummaging? couldn't we be rummaging? couldn't you be rummaging? couldn't they be rummaging?
Perfect
couldn't I have rummaged? couldn't you have rummaged? couldn't he have rummaged? couldn't we have rummaged? couldn't you have rummaged? couldn't they have rummaged?
V-ing perfect
couldn't I have been rummaging? couldn't you have been rummaging? couldn't he have been rummaging? couldn't we have been rummaging? couldn't you have been rummaging? couldn't they have been rummaging?