may crumple
Regular verb: crumple - crumpled- crumpled

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

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

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

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