may concenter
Verbo regular: concenter - concentered- concentered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may concenter
you may concenter
she may concenter
we may concenter
you may concenter
they may concenter 	I may be concentering
you may be concentering
she may be concentering
we may be concentering
you may be concentering
they may be concentering	I may have concentered
you may have concentered
she may have concentered
we may have concentered
you may have concentered
they may have concentered	I may have been concentering
you may have been concentering
she may have been concentering
we may have been concentering
you may have been concentering
they may have been concentering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may not concenter
you may not concenter
she may not concenter
we may not concenter
you may not concenter
they may not concenter 	I may not be concentering
you may not be concentering
she may not be concentering
we may not be concentering
you may not be concentering
they may not be concentering	I may not have concentered
you may not have concentered
she may not have concentered
we may not have concentered
you may not have concentered
they may not have concentered	I may not have been concentering
you may not have been concentering
she may not have been concentering
we may not have been concentering
you may not have been concentering
they may not have been concentering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I concenter?
may you concenter?
may she concenter?
may we concenter?
may you concenter?
may they concenter? 	may I be concentering?
may you be concentering?
may she be concentering?
may we be concentering?
may you be concentering?
may they be concentering? 	may I have concentered?
may you have concentered?
may she have concentered?
may we have concentered?
may you have concentered?
may they have concentered? 	may I have been concentering?
may you have been concentering?
may she have been concentering?
may we have been concentering?
may you have been concentering?
may they have been concentering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I not concenter?
may you not concenter?
may she not concenter?
may we not concenter?
may you not concenter?
may they not concenter? 	may I not be concentering?
may you not be concentering?
may she not be concentering?
may we not be concentering?
may you not be concentering?
may they not be concentering? 	may I not have concentered?
may you not have concentered?
may she not have concentered?
may we not have concentered?
may you not have concentered?
may they not have concentered? 	may I not have been concentering?
may you not have been concentering?
may she not have been concentering?
may we not have been concentering?
may you not have been concentering?
may they not have been concentering?