may collapse
Regular verb: collapse - collapsed- collapsed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may collapse
you may collapse
she may collapse
we may collapse
you may collapse
they may collapse 	I may be collapsing
you may be collapsing
she may be collapsing
we may be collapsing
you may be collapsing
they may be collapsing	I may have collapsed
you may have collapsed
she may have collapsed
we may have collapsed
you may have collapsed
they may have collapsed	I may have been collapsing
you may have been collapsing
she may have been collapsing
we may have been collapsing
you may have been collapsing
they may have been collapsing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't collapse
you mayn't collapse
she mayn't collapse
we mayn't collapse
you mayn't collapse
they mayn't collapse 	I mayn't be collapsing
you mayn't be collapsing
she mayn't be collapsing
we mayn't be collapsing
you mayn't be collapsing
they mayn't be collapsing	I mayn't have collapsed
you mayn't have collapsed
she mayn't have collapsed
we mayn't have collapsed
you mayn't have collapsed
they mayn't have collapsed	I mayn't have been collapsing
you mayn't have been collapsing
she mayn't have been collapsing
we mayn't have been collapsing
you mayn't have been collapsing
they mayn't have been collapsing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I collapse?
may you collapse?
may she collapse?
may we collapse?
may you collapse?
may they collapse? 	may I be collapsing?
may you be collapsing?
may she be collapsing?
may we be collapsing?
may you be collapsing?
may they be collapsing? 	may I have collapsed?
may you have collapsed?
may she have collapsed?
may we have collapsed?
may you have collapsed?
may they have collapsed? 	may I have been collapsing?
may you have been collapsing?
may she have been collapsing?
may we have been collapsing?
may you have been collapsing?
may they have been collapsing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I collapse?
mayn't you collapse?
mayn't she collapse?
mayn't we collapse?
mayn't you collapse?
mayn't they collapse? 	mayn't I be collapsing?
mayn't you be collapsing?
mayn't she be collapsing?
mayn't we be collapsing?
mayn't you be collapsing?
mayn't they be collapsing? 	mayn't I have collapsed?
mayn't you have collapsed?
mayn't she have collapsed?
mayn't we have collapsed?
mayn't you have collapsed?
mayn't they have collapsed? 	mayn't I have been collapsing?
mayn't you have been collapsing?
mayn't she have been collapsing?
mayn't we have been collapsing?
mayn't you have been collapsing?
mayn't they have been collapsing?