could vein
Verbo regular: vein - veined- veined

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could vein
you could vein
he could vein
we could vein
you could vein
they could vein 	I could be veining
you could be veining
he could be veining
we could be veining
you could be veining
they could be veining	I could have veined
you could have veined
he could have veined
we could have veined
you could have veined
they could have veined	I could have been veining
you could have been veining
he could have been veining
we could have been veining
you could have been veining
they could have been veining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not vein
you could not vein
he could not vein
we could not vein
you could not vein
they could not vein 	I could not be veining
you could not be veining
he could not be veining
we could not be veining
you could not be veining
they could not be veining	I could not have veined
you could not have veined
he could not have veined
we could not have veined
you could not have veined
they could not have veined	I could not have been veining
you could not have been veining
he could not have been veining
we could not have been veining
you could not have been veining
they could not have been veining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I vein?
could you vein?
could he vein?
could we vein?
could you vein?
could they vein? 	could I be veining?
could you be veining?
could he be veining?
could we be veining?
could you be veining?
could they be veining? 	could I have veined?
could you have veined?
could he have veined?
could we have veined?
could you have veined?
could they have veined? 	could I have been veining?
could you have been veining?
could he have been veining?
could we have been veining?
could you have been veining?
could they have been veining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not vein?
could you not vein?
could he not vein?
could we not vein?
could you not vein?
could they not vein? 	could I not be veining?
could you not be veining?
could he not be veining?
could we not be veining?
could you not be veining?
could they not be veining? 	could I not have veined?
could you not have veined?
could he not have veined?
could we not have veined?
could you not have veined?
could they not have veined? 	could I not have been veining?
could you not have been veining?
could he not have been veining?
could we not have been veining?
could you not have been veining?
could they not have been veining?