may concoct
Regular verb: concoct - concocted- concocted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may concoct
you may concoct
he may concoct
we may concoct
you may concoct
they may concoct 	I may be concocting
you may be concocting
he may be concocting
we may be concocting
you may be concocting
they may be concocting	I may have concocted
you may have concocted
he may have concocted
we may have concocted
you may have concocted
they may have concocted	I may have been concocting
you may have been concocting
he may have been concocting
we may have been concocting
you may have been concocting
they may have been concocting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't concoct
you mayn't concoct
he mayn't concoct
we mayn't concoct
you mayn't concoct
they mayn't concoct 	I mayn't be concocting
you mayn't be concocting
he mayn't be concocting
we mayn't be concocting
you mayn't be concocting
they mayn't be concocting	I mayn't have concocted
you mayn't have concocted
he mayn't have concocted
we mayn't have concocted
you mayn't have concocted
they mayn't have concocted	I mayn't have been concocting
you mayn't have been concocting
he mayn't have been concocting
we mayn't have been concocting
you mayn't have been concocting
they mayn't have been concocting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I concoct?
may you concoct?
may he concoct?
may we concoct?
may you concoct?
may they concoct? 	may I be concocting?
may you be concocting?
may he be concocting?
may we be concocting?
may you be concocting?
may they be concocting? 	may I have concocted?
may you have concocted?
may he have concocted?
may we have concocted?
may you have concocted?
may they have concocted? 	may I have been concocting?
may you have been concocting?
may he have been concocting?
may we have been concocting?
may you have been concocting?
may they have been concocting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I concoct?
mayn't you concoct?
mayn't he concoct?
mayn't we concoct?
mayn't you concoct?
mayn't they concoct? 	mayn't I be concocting?
mayn't you be concocting?
mayn't he be concocting?
mayn't we be concocting?
mayn't you be concocting?
mayn't they be concocting? 	mayn't I have concocted?
mayn't you have concocted?
mayn't he have concocted?
mayn't we have concocted?
mayn't you have concocted?
mayn't they have concocted? 	mayn't I have been concocting?
mayn't you have been concocting?
mayn't he have been concocting?
mayn't we have been concocting?
mayn't you have been concocting?
mayn't they have been concocting?