may concern
Verbo regular: concern - concerned- concerned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may concern
you may concern
she may concern
we may concern
you may concern
they may concern 	I may be concerning
you may be concerning
she may be concerning
we may be concerning
you may be concerning
they may be concerning	I may have concerned
you may have concerned
she 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
she may have been concerning
we may have been concerning
you may have been concerning
they may have been concerning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't concern
you mayn't concern
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
may I concern?
may you concern?
may she concern?
may we concern?
may you concern?
may they concern? 	may I be concerning?
may you be concerning?
may she be concerning?
may we be concerning?
may you be concerning?
may they be concerning? 	may I have concerned?
may you have concerned?
may she 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 she have been concerning?
may we have been concerning?
may you have been concerning?
may they have been concerning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I concern?
mayn't you concern?
mayn't she 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 she 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 she 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 she have been concerning?
mayn't we have been concerning?
mayn't you have been concerning?
mayn't they have been concerning?