may concuss
Regular verb: concuss - concussed- concussed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may concuss
you may concuss
he may concuss
we may concuss
you may concuss
they may concuss 	I may be concussing
you may be concussing
he may be concussing
we may be concussing
you may be concussing
they may be concussing	I may have concussed
you may have concussed
he may have concussed
we may have concussed
you may have concussed
they may have concussed	I may have been concussing
you may have been concussing
he may have been concussing
we may have been concussing
you may have been concussing
they may have been concussing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't concuss
you mayn't concuss
he mayn't concuss
we mayn't concuss
you mayn't concuss
they mayn't concuss 	I mayn't be concussing
you mayn't be concussing
he mayn't be concussing
we mayn't be concussing
you mayn't be concussing
they mayn't be concussing	I mayn't have concussed
you mayn't have concussed
he mayn't have concussed
we mayn't have concussed
you mayn't have concussed
they mayn't have concussed	I mayn't have been concussing
you mayn't have been concussing
he mayn't have been concussing
we mayn't have been concussing
you mayn't have been concussing
they mayn't have been concussing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I concuss?
may you concuss?
may he concuss?
may we concuss?
may you concuss?
may they concuss? 	may I be concussing?
may you be concussing?
may he be concussing?
may we be concussing?
may you be concussing?
may they be concussing? 	may I have concussed?
may you have concussed?
may he have concussed?
may we have concussed?
may you have concussed?
may they have concussed? 	may I have been concussing?
may you have been concussing?
may he have been concussing?
may we have been concussing?
may you have been concussing?
may they have been concussing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I concuss?
mayn't you concuss?
mayn't he concuss?
mayn't we concuss?
mayn't you concuss?
mayn't they concuss? 	mayn't I be concussing?
mayn't you be concussing?
mayn't he be concussing?
mayn't we be concussing?
mayn't you be concussing?
mayn't they be concussing? 	mayn't I have concussed?
mayn't you have concussed?
mayn't he have concussed?
mayn't we have concussed?
mayn't you have concussed?
mayn't they have concussed? 	mayn't I have been concussing?
mayn't you have been concussing?
mayn't he have been concussing?
mayn't we have been concussing?
mayn't you have been concussing?
mayn't they have been concussing?