I could count you could count he could count we could count you could count they could count
V-ing form
I could be counting you could be counting he could be counting we could be counting you could be counting they could be counting
Perfect
I could have counted you could have counted he could have counted we could have counted you could have counted they could have counted
V-ing perfect
I could have been counting you could have been counting he could have been counting we could have been counting you could have been counting they could have been counting
Negation
Simple form
I could not count you could not count he could not count we could not count you could not count they could not count
V-ing form
I could not be counting you could not be counting he could not be counting we could not be counting you could not be counting they could not be counting
Perfect
I could not have counted you could not have counted he could not have counted we could not have counted you could not have counted they could not have counted
V-ing perfect
I could not have been counting you could not have been counting he could not have been counting we could not have been counting you could not have been counting they could not have been counting
Interrogative form
Simple form
could I count? could you count? could he count? could we count? could you count? could they count?
V-ing form
could I be counting? could you be counting? could he be counting? could we be counting? could you be counting? could they be counting?
Perfect
could I have counted? could you have counted? could he have counted? could we have counted? could you have counted? could they have counted?
V-ing perfect
could I have been counting? could you have been counting? could he have been counting? could we have been counting? could you have been counting? could they have been counting?
Interro-negative form
Simple form
could I not count? could you not count? could he not count? could we not count? could you not count? could they not count?
V-ing form
could I not be counting? could you not be counting? could he not be counting? could we not be counting? could you not be counting? could they not be counting?
Perfect
could I not have counted? could you not have counted? could he not have counted? could we not have counted? could you not have counted? could they not have counted?
V-ing perfect
could I not have been counting? could you not have been counting? could he not have been counting? could we not have been counting? could you not have been counting? could they not have been counting?