I could crimp you could crimp he could crimp we could crimp you could crimp they could crimp
V-ing form
I could be crimping you could be crimping he could be crimping we could be crimping you could be crimping they could be crimping
Perfect
I could have crimped you could have crimped he could have crimped we could have crimped you could have crimped they could have crimped
V-ing perfect
I could have been crimping you could have been crimping he could have been crimping we could have been crimping you could have been crimping they could have been crimping
Negation
Simple form
I could not crimp you could not crimp he could not crimp we could not crimp you could not crimp they could not crimp
V-ing form
I could not be crimping you could not be crimping he could not be crimping we could not be crimping you could not be crimping they could not be crimping
Perfect
I could not have crimped you could not have crimped he could not have crimped we could not have crimped you could not have crimped they could not have crimped
V-ing perfect
I could not have been crimping you could not have been crimping he could not have been crimping we could not have been crimping you could not have been crimping they could not have been crimping
Interrogative form
Simple form
could I crimp? could you crimp? could he crimp? could we crimp? could you crimp? could they crimp?
V-ing form
could I be crimping? could you be crimping? could he be crimping? could we be crimping? could you be crimping? could they be crimping?
Perfect
could I have crimped? could you have crimped? could he have crimped? could we have crimped? could you have crimped? could they have crimped?
V-ing perfect
could I have been crimping? could you have been crimping? could he have been crimping? could we have been crimping? could you have been crimping? could they have been crimping?
Interro-negative form
Simple form
could I not crimp? could you not crimp? could he not crimp? could we not crimp? could you not crimp? could they not crimp?
V-ing form
could I not be crimping? could you not be crimping? could he not be crimping? could we not be crimping? could you not be crimping? could they not be crimping?
Perfect
could I not have crimped? could you not have crimped? could he not have crimped? could we not have crimped? could you not have crimped? could they not have crimped?
V-ing perfect
could I not have been crimping? could you not have been crimping? could he not have been crimping? could we not have been crimping? could you not have been crimping? could they not have been crimping?