I may crumple you may crumple he may crumple we may crumple you may crumple they may crumple
V-ing form
I may be crumpling you may be crumpling he may be crumpling we may be crumpling you may be crumpling they may be crumpling
Perfect
I may have crumpled you may have crumpled he may have crumpled we may have crumpled you may have crumpled they may have crumpled
V-ing perfect
I may have been crumpling you may have been crumpling he may have been crumpling we may have been crumpling you may have been crumpling they may have been crumpling
Negation
Simple form
I may not crumple you may not crumple he may not crumple we may not crumple you may not crumple they may not crumple
V-ing form
I may not be crumpling you may not be crumpling he may not be crumpling we may not be crumpling you may not be crumpling they may not be crumpling
Perfect
I may not have crumpled you may not have crumpled he may not have crumpled we may not have crumpled you may not have crumpled they may not have crumpled
V-ing perfect
I may not have been crumpling you may not have been crumpling he may not have been crumpling we may not have been crumpling you may not have been crumpling they may not have been crumpling
Interrogative form
Simple form
may I crumple? may you crumple? may he crumple? may we crumple? may you crumple? may they crumple?
V-ing form
may I be crumpling? may you be crumpling? may he be crumpling? may we be crumpling? may you be crumpling? may they be crumpling?
Perfect
may I have crumpled? may you have crumpled? may he have crumpled? may we have crumpled? may you have crumpled? may they have crumpled?
V-ing perfect
may I have been crumpling? may you have been crumpling? may he have been crumpling? may we have been crumpling? may you have been crumpling? may they have been crumpling?
Interro-negative form
Simple form
may I not crumple? may you not crumple? may he not crumple? may we not crumple? may you not crumple? may they not crumple?
V-ing form
may I not be crumpling? may you not be crumpling? may he not be crumpling? may we not be crumpling? may you not be crumpling? may they not be crumpling?
Perfect
may I not have crumpled? may you not have crumpled? may he not have crumpled? may we not have crumpled? may you not have crumpled? may they not have crumpled?
V-ing perfect
may I not have been crumpling? may you not have been crumpling? may he not have been crumpling? may we not have been crumpling? may you not have been crumpling? may they not have been crumpling?