English verb conjugation
CAN CRUMPLE

Regular verb: crumple - crumpled - crumpled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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