I could apple-polish you could apple-polish he could apple-polish we could apple-polish you could apple-polish they could apple-polish
V-ing form
I could be apple-polishing you could be apple-polishing he could be apple-polishing we could be apple-polishing you could be apple-polishing they could be apple-polishing
Perfect
I could have apple-polished you could have apple-polished he could have apple-polished we could have apple-polished you could have apple-polished they could have apple-polished
V-ing perfect
I could have been apple-polishing you could have been apple-polishing he could have been apple-polishing we could have been apple-polishing you could have been apple-polishing they could have been apple-polishing
Negation
Simple form
I could not apple-polish you could not apple-polish he could not apple-polish we could not apple-polish you could not apple-polish they could not apple-polish
V-ing form
I could not be apple-polishing you could not be apple-polishing he could not be apple-polishing we could not be apple-polishing you could not be apple-polishing they could not be apple-polishing
Perfect
I could not have apple-polished you could not have apple-polished he could not have apple-polished we could not have apple-polished you could not have apple-polished they could not have apple-polished
V-ing perfect
I could not have been apple-polishing you could not have been apple-polishing he could not have been apple-polishing we could not have been apple-polishing you could not have been apple-polishing they could not have been apple-polishing
Interrogative form
Simple form
could I apple-polish? could you apple-polish? could he apple-polish? could we apple-polish? could you apple-polish? could they apple-polish?
V-ing form
could I be apple-polishing? could you be apple-polishing? could he be apple-polishing? could we be apple-polishing? could you be apple-polishing? could they be apple-polishing?
Perfect
could I have apple-polished? could you have apple-polished? could he have apple-polished? could we have apple-polished? could you have apple-polished? could they have apple-polished?
V-ing perfect
could I have been apple-polishing? could you have been apple-polishing? could he have been apple-polishing? could we have been apple-polishing? could you have been apple-polishing? could they have been apple-polishing?
Interro-negative form
Simple form
could I not apple-polish? could you not apple-polish? could he not apple-polish? could we not apple-polish? could you not apple-polish? could they not apple-polish?
V-ing form
could I not be apple-polishing? could you not be apple-polishing? could he not be apple-polishing? could we not be apple-polishing? could you not be apple-polishing? could they not be apple-polishing?
Perfect
could I not have apple-polished? could you not have apple-polished? could he not have apple-polished? could we not have apple-polished? could you not have apple-polished? could they not have apple-polished?
V-ing perfect
could I not have been apple-polishing? could you not have been apple-polishing? could he not have been apple-polishing? could we not have been apple-polishing? could you not have been apple-polishing? could they not have been apple-polishing?