I could tape you could tape he could tape we could tape you could tape they could tape
V-ing form
I could be taping you could be taping he could be taping we could be taping you could be taping they could be taping
Perfect
I could have taped you could have taped he could have taped we could have taped you could have taped they could have taped
V-ing perfect
I could have been taping you could have been taping he could have been taping we could have been taping you could have been taping they could have been taping
Negation
Simple form
I could not tape you could not tape he could not tape we could not tape you could not tape they could not tape
V-ing form
I could not be taping you could not be taping he could not be taping we could not be taping you could not be taping they could not be taping
Perfect
I could not have taped you could not have taped he could not have taped we could not have taped you could not have taped they could not have taped
V-ing perfect
I could not have been taping you could not have been taping he could not have been taping we could not have been taping you could not have been taping they could not have been taping
Interrogative form
Simple form
could I tape? could you tape? could he tape? could we tape? could you tape? could they tape?
V-ing form
could I be taping? could you be taping? could he be taping? could we be taping? could you be taping? could they be taping?
Perfect
could I have taped? could you have taped? could he have taped? could we have taped? could you have taped? could they have taped?
V-ing perfect
could I have been taping? could you have been taping? could he have been taping? could we have been taping? could you have been taping? could they have been taping?
Interro-negative form
Simple form
could I not tape? could you not tape? could he not tape? could we not tape? could you not tape? could they not tape?
V-ing form
could I not be taping? could you not be taping? could he not be taping? could we not be taping? could you not be taping? could they not be taping?
Perfect
could I not have taped? could you not have taped? could he not have taped? could we not have taped? could you not have taped? could they not have taped?
V-ing perfect
could I not have been taping? could you not have been taping? could he not have been taping? could we not have been taping? could you not have been taping? could they not have been taping?