I could rumple you could rumple he could rumple we could rumple you could rumple they could rumple
V-ing form
I could be rumpling you could be rumpling he could be rumpling we could be rumpling you could be rumpling they could be rumpling
Perfect
I could have rumpled you could have rumpled he could have rumpled we could have rumpled you could have rumpled they could have rumpled
V-ing perfect
I could have been rumpling you could have been rumpling he could have been rumpling we could have been rumpling you could have been rumpling they could have been rumpling
Negation
Simple form
I could not rumple you could not rumple he could not rumple we could not rumple you could not rumple they could not rumple
V-ing form
I could not be rumpling you could not be rumpling he could not be rumpling we could not be rumpling you could not be rumpling they could not be rumpling
Perfect
I could not have rumpled you could not have rumpled he could not have rumpled we could not have rumpled you could not have rumpled they could not have rumpled
V-ing perfect
I could not have been rumpling you could not have been rumpling he could not have been rumpling we could not have been rumpling you could not have been rumpling they could not have been rumpling
Interrogative form
Simple form
could I rumple? could you rumple? could he rumple? could we rumple? could you rumple? could they rumple?
V-ing form
could I be rumpling? could you be rumpling? could he be rumpling? could we be rumpling? could you be rumpling? could they be rumpling?
Perfect
could I have rumpled? could you have rumpled? could he have rumpled? could we have rumpled? could you have rumpled? could they have rumpled?
V-ing perfect
could I have been rumpling? could you have been rumpling? could he have been rumpling? could we have been rumpling? could you have been rumpling? could they have been rumpling?
Interro-negative form
Simple form
could I not rumple? could you not rumple? could he not rumple? could we not rumple? could you not rumple? could they not rumple?
V-ing form
could I not be rumpling? could you not be rumpling? could he not be rumpling? could we not be rumpling? could you not be rumpling? could they not be rumpling?
Perfect
could I not have rumpled? could you not have rumpled? could he not have rumpled? could we not have rumpled? could you not have rumpled? could they not have rumpled?
V-ing perfect
could I not have been rumpling? could you not have been rumpling? could he not have been rumpling? could we not have been rumpling? could you not have been rumpling? could they not have been rumpling?