I could arm you could arm he could arm we could arm you could arm they could arm
V-ing form
I could be arming you could be arming he could be arming we could be arming you could be arming they could be arming
Perfect
I could have armed you could have armed he could have armed we could have armed you could have armed they could have armed
V-ing perfect
I could have been arming you could have been arming he could have been arming we could have been arming you could have been arming they could have been arming
Negation
Simple form
I could not arm you could not arm he could not arm we could not arm you could not arm they could not arm
V-ing form
I could not be arming you could not be arming he could not be arming we could not be arming you could not be arming they could not be arming
Perfect
I could not have armed you could not have armed he could not have armed we could not have armed you could not have armed they could not have armed
V-ing perfect
I could not have been arming you could not have been arming he could not have been arming we could not have been arming you could not have been arming they could not have been arming
Interrogative form
Simple form
could I arm? could you arm? could he arm? could we arm? could you arm? could they arm?
V-ing form
could I be arming? could you be arming? could he be arming? could we be arming? could you be arming? could they be arming?
Perfect
could I have armed? could you have armed? could he have armed? could we have armed? could you have armed? could they have armed?
V-ing perfect
could I have been arming? could you have been arming? could he have been arming? could we have been arming? could you have been arming? could they have been arming?
Interro-negative form
Simple form
could I not arm? could you not arm? could he not arm? could we not arm? could you not arm? could they not arm?
V-ing form
could I not be arming? could you not be arming? could he not be arming? could we not be arming? could you not be arming? could they not be arming?
Perfect
could I not have armed? could you not have armed? could he not have armed? could we not have armed? could you not have armed? could they not have armed?
V-ing perfect
could I not have been arming? could you not have been arming? could he not have been arming? could we not have been arming? could you not have been arming? could they not have been arming?