can concave
Verbo regular: concave - concaved- concaved

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can concave
you can concave
she can concave
we can concave
you can concave
they can concave 	I can be concaving
you can be concaving
she can be concaving
we can be concaving
you can be concaving
they can be concaving	I can have concaved
you can have concaved
she can have concaved
we can have concaved
you can have concaved
they can have concaved	I can have been concaving
you can have been concaving
she can have been concaving
we can have been concaving
you can have been concaving
they can have been concaving	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot concave
you cannot concave
she cannot concave
we cannot concave
you cannot concave
they cannot concave 	I cannot be concaving
you cannot be concaving
she cannot be concaving
we cannot be concaving
you cannot be concaving
they cannot be concaving	I cannot have concaved
you cannot have concaved
she cannot have concaved
we cannot have concaved
you cannot have concaved
they cannot have concaved	I cannot have been concaving
you cannot have been concaving
she cannot have been concaving
we cannot have been concaving
you cannot have been concaving
they cannot have been concaving	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I concave?
can you concave?
can she concave?
can we concave?
can you concave?
can they concave? 	can I be concaving?
can you be concaving?
can she be concaving?
can we be concaving?
can you be concaving?
can they be concaving? 	can I have concaved?
can you have concaved?
can she have concaved?
can we have concaved?
can you have concaved?
can they have concaved? 	can I have been concaving?
can you have been concaving?
can she have been concaving?
can we have been concaving?
can you have been concaving?
can they have been concaving? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not concave?
can you not concave?
can she not concave?
can we not concave?
can you not concave?
can they not concave? 	can I not be concaving?
can you not be concaving?
can she not be concaving?
can we not be concaving?
can you not be concaving?
can they not be concaving? 	can I not have concaved?
can you not have concaved?
can she not have concaved?
can we not have concaved?
can you not have concaved?
can they not have concaved? 	can I not have been concaving?
can you not have been concaving?
can she not have been concaving?
can we not have been concaving?
can you not have been concaving?
can they not have been concaving?