may concern
Verbo regular: concern - concerned- concerned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may concern
you may concern
he may concern
we may concern
you may concern
they may concern 	I may be concerning
you may be concerning
he may be concerning
we may be concerning
you may be concerning
they may be concerning	I may have concerned
you may have concerned
he may have concerned
we may have concerned
you may have concerned
they may have concerned	I may have been concerning
you may have been concerning
he may have been concerning
we may have been concerning
you may have been concerning
they may have been concerning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mayn't concern
you mayn't concern
he mayn't concern
we mayn't concern
you mayn't concern
they mayn't concern 	I mayn't be concerning
you mayn't be concerning
he mayn't be concerning
we mayn't be concerning
you mayn't be concerning
they mayn't be concerning	I mayn't have concerned
you mayn't have concerned
he mayn't have concerned
we mayn't have concerned
you mayn't have concerned
they mayn't have concerned	I mayn't have been concerning
you mayn't have been concerning
he mayn't have been concerning
we mayn't have been concerning
you mayn't have been concerning
they mayn't have been concerning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I concern?
may you concern?
may he concern?
may we concern?
may you concern?
may they concern? 	may I be concerning?
may you be concerning?
may he be concerning?
may we be concerning?
may you be concerning?
may they be concerning? 	may I have concerned?
may you have concerned?
may he have concerned?
may we have concerned?
may you have concerned?
may they have concerned? 	may I have been concerning?
may you have been concerning?
may he have been concerning?
may we have been concerning?
may you have been concerning?
may they have been concerning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mayn't I concern?
mayn't you concern?
mayn't he concern?
mayn't we concern?
mayn't you concern?
mayn't they concern? 	mayn't I be concerning?
mayn't you be concerning?
mayn't he be concerning?
mayn't we be concerning?
mayn't you be concerning?
mayn't they be concerning? 	mayn't I have concerned?
mayn't you have concerned?
mayn't he have concerned?
mayn't we have concerned?
mayn't you have concerned?
mayn't they have concerned? 	mayn't I have been concerning?
mayn't you have been concerning?
mayn't he have been concerning?
mayn't we have been concerning?
mayn't you have been concerning?
mayn't they have been concerning?