can concert
Verbo regular: concert - concerted- concerted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can concert
you can concert
he can concert
we can concert
you can concert
they can concert 	I can be concerting
you can be concerting
he can be concerting
we can be concerting
you can be concerting
they can be concerting	I can have concerted
you can have concerted
he can have concerted
we can have concerted
you can have concerted
they can have concerted	I can have been concerting
you can have been concerting
he can have been concerting
we can have been concerting
you can have been concerting
they can have been concerting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot concert
you cannot concert
he cannot concert
we cannot concert
you cannot concert
they cannot concert 	I cannot be concerting
you cannot be concerting
he cannot be concerting
we cannot be concerting
you cannot be concerting
they cannot be concerting	I cannot have concerted
you cannot have concerted
he cannot have concerted
we cannot have concerted
you cannot have concerted
they cannot have concerted	I cannot have been concerting
you cannot have been concerting
he cannot have been concerting
we cannot have been concerting
you cannot have been concerting
they cannot have been concerting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I concert?
can you concert?
can he concert?
can we concert?
can you concert?
can they concert? 	can I be concerting?
can you be concerting?
can he be concerting?
can we be concerting?
can you be concerting?
can they be concerting? 	can I have concerted?
can you have concerted?
can he have concerted?
can we have concerted?
can you have concerted?
can they have concerted? 	can I have been concerting?
can you have been concerting?
can he have been concerting?
can we have been concerting?
can you have been concerting?
can they have been concerting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not concert?
can you not concert?
can he not concert?
can we not concert?
can you not concert?
can they not concert? 	can I not be concerting?
can you not be concerting?
can he not be concerting?
can we not be concerting?
can you not be concerting?
can they not be concerting? 	can I not have concerted?
can you not have concerted?
can he not have concerted?
can we not have concerted?
can you not have concerted?
can they not have concerted? 	can I not have been concerting?
can you not have been concerting?
can he not have been concerting?
can we not have been concerting?
can you not have been concerting?
can they not have been concerting?