could choir
Verbo regular: choir - choired- choired

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could choir
you could choir
he could choir
we could choir
you could choir
they could choir 	I could be choiring
you could be choiring
he could be choiring
we could be choiring
you could be choiring
they could be choiring	I could have choired
you could have choired
he could have choired
we could have choired
you could have choired
they could have choired	I could have been choiring
you could have been choiring
he could have been choiring
we could have been choiring
you could have been choiring
they could have been choiring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not choir
you could not choir
he could not choir
we could not choir
you could not choir
they could not choir 	I could not be choiring
you could not be choiring
he could not be choiring
we could not be choiring
you could not be choiring
they could not be choiring	I could not have choired
you could not have choired
he could not have choired
we could not have choired
you could not have choired
they could not have choired	I could not have been choiring
you could not have been choiring
he could not have been choiring
we could not have been choiring
you could not have been choiring
they could not have been choiring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I choir?
could you choir?
could he choir?
could we choir?
could you choir?
could they choir? 	could I be choiring?
could you be choiring?
could he be choiring?
could we be choiring?
could you be choiring?
could they be choiring? 	could I have choired?
could you have choired?
could he have choired?
could we have choired?
could you have choired?
could they have choired? 	could I have been choiring?
could you have been choiring?
could he have been choiring?
could we have been choiring?
could you have been choiring?
could they have been choiring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not choir?
could you not choir?
could he not choir?
could we not choir?
could you not choir?
could they not choir? 	could I not be choiring?
could you not be choiring?
could he not be choiring?
could we not be choiring?
could you not be choiring?
could they not be choiring? 	could I not have choired?
could you not have choired?
could he not have choired?
could we not have choired?
could you not have choired?
could they not have choired? 	could I not have been choiring?
could you not have been choiring?
could he not have been choiring?
could we not have been choiring?
could you not have been choiring?
could they not have been choiring?