I could scrabble you could scrabble he could scrabble we could scrabble you could scrabble they could scrabble
V-ing form
I could be scrabbling you could be scrabbling he could be scrabbling we could be scrabbling you could be scrabbling they could be scrabbling
Perfect
I could have scrabbled you could have scrabbled he could have scrabbled we could have scrabbled you could have scrabbled they could have scrabbled
V-ing perfect
I could have been scrabbling you could have been scrabbling he could have been scrabbling we could have been scrabbling you could have been scrabbling they could have been scrabbling
Negation
Simple form
I could not scrabble you could not scrabble he could not scrabble we could not scrabble you could not scrabble they could not scrabble
V-ing form
I could not be scrabbling you could not be scrabbling he could not be scrabbling we could not be scrabbling you could not be scrabbling they could not be scrabbling
Perfect
I could not have scrabbled you could not have scrabbled he could not have scrabbled we could not have scrabbled you could not have scrabbled they could not have scrabbled
V-ing perfect
I could not have been scrabbling you could not have been scrabbling he could not have been scrabbling we could not have been scrabbling you could not have been scrabbling they could not have been scrabbling
Interrogative form
Simple form
could I scrabble? could you scrabble? could he scrabble? could we scrabble? could you scrabble? could they scrabble?
V-ing form
could I be scrabbling? could you be scrabbling? could he be scrabbling? could we be scrabbling? could you be scrabbling? could they be scrabbling?
Perfect
could I have scrabbled? could you have scrabbled? could he have scrabbled? could we have scrabbled? could you have scrabbled? could they have scrabbled?
V-ing perfect
could I have been scrabbling? could you have been scrabbling? could he have been scrabbling? could we have been scrabbling? could you have been scrabbling? could they have been scrabbling?
Interro-negative form
Simple form
could I not scrabble? could you not scrabble? could he not scrabble? could we not scrabble? could you not scrabble? could they not scrabble?
V-ing form
could I not be scrabbling? could you not be scrabbling? could he not be scrabbling? could we not be scrabbling? could you not be scrabbling? could they not be scrabbling?
Perfect
could I not have scrabbled? could you not have scrabbled? could he not have scrabbled? could we not have scrabbled? could you not have scrabbled? could they not have scrabbled?
V-ing perfect
could I not have been scrabbling? could you not have been scrabbling? could he not have been scrabbling? could we not have been scrabbling? could you not have been scrabbling? could they not have been scrabbling?