English verb conjugation
COULD CRUMPLE

Regular verb: crumple - crumpled - crumpled

Affirmation

Simple form	V-ing form
I could crumple you could crumple she could crumple we could crumple you could crumple they could crumple	I could be crumpling you could be crumpling she could be crumpling we could be crumpling you could be crumpling they could be crumpling
Perfect	V-ing perfect
I could have crumpled you could have crumpled she could have crumpled we could have crumpled you could have crumpled they could have crumpled	I could have been crumpling you could have been crumpling she could have been crumpling we could have been crumpling you could have been crumpling they could have been crumpling

Negation

Simple form	V-ing form
I couldn't crumple you couldn't crumple she couldn't crumple we couldn't crumple you couldn't crumple they couldn't crumple	I couldn't be crumpling you couldn't be crumpling she couldn't be crumpling we couldn't be crumpling you couldn't be crumpling they couldn't be crumpling
Perfect	V-ing perfect
I couldn't have crumpled you couldn't have crumpled she couldn't have crumpled we couldn't have crumpled you couldn't have crumpled they couldn't have crumpled	I couldn't have been crumpling you couldn't have been crumpling she couldn't have been crumpling we couldn't have been crumpling you couldn't have been crumpling they couldn't have been crumpling

Interrogative form

Simple form	V-ing form
could I crumple? could you crumple? could she crumple? could we crumple? could you crumple? could they crumple?	could I be crumpling? could you be crumpling? could she be crumpling? could we be crumpling? could you be crumpling? could they be crumpling?
Perfect	V-ing perfect
could I have crumpled? could you have crumpled? could she have crumpled? could we have crumpled? could you have crumpled? could they have crumpled?	could I have been crumpling? could you have been crumpling? could she have been crumpling? could we have been crumpling? could you have been crumpling? could they have been crumpling?

Interro-negative form

Simple form	V-ing form
couldn't I crumple? couldn't you crumple? couldn't she crumple? couldn't we crumple? couldn't you crumple? couldn't they crumple?	couldn't I be crumpling? couldn't you be crumpling? couldn't she be crumpling? couldn't we be crumpling? couldn't you be crumpling? couldn't they be crumpling?
Perfect	V-ing perfect
couldn't I have crumpled? couldn't you have crumpled? couldn't she have crumpled? couldn't we have crumpled? couldn't you have crumpled? couldn't they have crumpled?	couldn't I have been crumpling? couldn't you have been crumpling? couldn't she have been crumpling? couldn't we have been crumpling? couldn't you have been crumpling? couldn't they have been crumpling?