should concert
Verbo regular: concert - concerted- concerted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should concert
you should concert
he should concert
we should concert
you should concert
they should concert 	I should be concerting
you should be concerting
he should be concerting
we should be concerting
you should be concerting
they should be concerting	I should have concerted
you should have concerted
he should have concerted
we should have concerted
you should have concerted
they should have concerted	I should have been concerting
you should have been concerting
he should have been concerting
we should have been concerting
you should have been concerting
they should have been concerting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not concert
you should not concert
he should not concert
we should not concert
you should not concert
they should not concert 	I should not be concerting
you should not be concerting
he should not be concerting
we should not be concerting
you should not be concerting
they should not be concerting	I should not have concerted
you should not have concerted
he should not have concerted
we should not have concerted
you should not have concerted
they should not have concerted	I should not have been concerting
you should not have been concerting
he should not have been concerting
we should not have been concerting
you should not have been concerting
they should not have been concerting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I concert?
should you concert?
should he concert?
should we concert?
should you concert?
should they concert? 	should I be concerting?
should you be concerting?
should he be concerting?
should we be concerting?
should you be concerting?
should they be concerting? 	should I have concerted?
should you have concerted?
should he have concerted?
should we have concerted?
should you have concerted?
should they have concerted? 	should I have been concerting?
should you have been concerting?
should he have been concerting?
should we have been concerting?
should you have been concerting?
should they have been concerting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not concert?
should you not concert?
should he not concert?
should we not concert?
should you not concert?
should they not concert? 	should I not be concerting?
should you not be concerting?
should he not be concerting?
should we not be concerting?
should you not be concerting?
should they not be concerting? 	should I not have concerted?
should you not have concerted?
should he not have concerted?
should we not have concerted?
should you not have concerted?
should they not have concerted? 	should I not have been concerting?
should you not have been concerting?
should he not have been concerting?
should we not have been concerting?
should you not have been concerting?
should they not have been concerting?