I could field-strip you could field-strip he could field-strip we could field-strip you could field-strip they could field-strip
V-ing form
I could be field-striping you could be field-striping he could be field-striping we could be field-striping you could be field-striping they could be field-striping
Perfect
I could have field-striped you could have field-striped he could have field-striped we could have field-striped you could have field-striped they could have field-striped
V-ing perfect
I could have been field-striping you could have been field-striping he could have been field-striping we could have been field-striping you could have been field-striping they could have been field-striping
Negation
Simple form
I could not field-strip you could not field-strip he could not field-strip we could not field-strip you could not field-strip they could not field-strip
V-ing form
I could not be field-striping you could not be field-striping he could not be field-striping we could not be field-striping you could not be field-striping they could not be field-striping
Perfect
I could not have field-striped you could not have field-striped he could not have field-striped we could not have field-striped you could not have field-striped they could not have field-striped
V-ing perfect
I could not have been field-striping you could not have been field-striping he could not have been field-striping we could not have been field-striping you could not have been field-striping they could not have been field-striping
Interrogative form
Simple form
could I field-strip? could you field-strip? could he field-strip? could we field-strip? could you field-strip? could they field-strip?
V-ing form
could I be field-striping? could you be field-striping? could he be field-striping? could we be field-striping? could you be field-striping? could they be field-striping?
Perfect
could I have field-striped? could you have field-striped? could he have field-striped? could we have field-striped? could you have field-striped? could they have field-striped?
V-ing perfect
could I have been field-striping? could you have been field-striping? could he have been field-striping? could we have been field-striping? could you have been field-striping? could they have been field-striping?
Interro-negative form
Simple form
could I not field-strip? could you not field-strip? could he not field-strip? could we not field-strip? could you not field-strip? could they not field-strip?
V-ing form
could I not be field-striping? could you not be field-striping? could he not be field-striping? could we not be field-striping? could you not be field-striping? could they not be field-striping?
Perfect
could I not have field-striped? could you not have field-striped? could he not have field-striped? could we not have field-striped? could you not have field-striped? could they not have field-striped?
V-ing perfect
could I not have been field-striping? could you not have been field-striping? could he not have been field-striping? could we not have been field-striping? could you not have been field-striping? could they not have been field-striping?