ought to concenter
Verbo regular: concenter - concentered- concentered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought to concenter
you ought to concenter
he ought to concenter
we ought to concenter
you ought to concenter
they ought to concenter 	I ought to be concentering
you ought to be concentering
he ought to be concentering
we ought to be concentering
you ought to be concentering
they ought to be concentering	I ought to have concentered
you ought to have concentered
he ought to have concentered
we ought to have concentered
you ought to have concentered
they ought to have concentered	I ought to have been concentering
you ought to have been concentering
he ought to have been concentering
we ought to have been concentering
you ought to have been concentering
they ought to have been concentering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought not to concenter
you ought not to concenter
he ought not to concenter
we ought not to concenter
you ought not to concenter
they ought not to concenter 	I ought not to concentering
you ought not to concentering
he ought not to concentering
we ought not to concentering
you ought not to concentering
they ought not to concentering	I ought not to have concentered
you ought not to have concentered
he ought not to have concentered
we ought not to have concentered
you ought not to have concentered
they ought not to have concentered	I ought not to have been concentering
you ought not to have been concentering
he ought not to have been concentering
we ought not to have been concentering
you ought not to have been concentering
they ought not to have been concentering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought to I concenter?
ought to you concenter?
ought to he concenter?
ought to we concenter?
ought to you concenter?
ought to they concenter? 	ought to I be concentering?
ought to you be concentering?
ought to he be concentering?
ought to we be concentering?
ought to you be concentering?
ought to they be concentering? 	ought to I have concentered?
ought to you have concentered?
ought to he have concentered?
ought to we have concentered?
ought to you have concentered?
ought to they have concentered? 	ought to I have been concentering?
ought to you have been concentering?
ought to he have been concentering?
ought to we have been concentering?
ought to you have been concentering?
ought to they have been concentering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought I not to concenter?
ought you not to concenter?
ought he not to concenter?
ought we not to concenter?
ought you not to concenter?
ought they not to concenter? 	ought I not to be concentering?
ought you not to be concentering?
ought he not to be concentering?
ought we not to be concentering?
ought you not to be concentering?
ought they not to be concentering? 	ought I not to have concentered?
ought you not to have concentered?
ought he not to have concentered?
ought we not to have concentered?
ought you not to have concentered?
ought they not to have concentered? 	ought I not to have been concentering?
ought you not to have been concentering?
ought he not to have been concentering?
ought we not to have been concentering?
ought you not to have been concentering?
ought they not to have been concentering?