could vapour
Verbo regular: vapour - vapoured- vapoured

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could vapour
you could vapour
he could vapour
we could vapour
you could vapour
they could vapour 	I could be vapouring
you could be vapouring
he could be vapouring
we could be vapouring
you could be vapouring
they could be vapouring	I could have vapoured
you could have vapoured
he could have vapoured
we could have vapoured
you could have vapoured
they could have vapoured	I could have been vapouring
you could have been vapouring
he could have been vapouring
we could have been vapouring
you could have been vapouring
they could have been vapouring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not vapour
you could not vapour
he could not vapour
we could not vapour
you could not vapour
they could not vapour 	I could not be vapouring
you could not be vapouring
he could not be vapouring
we could not be vapouring
you could not be vapouring
they could not be vapouring	I could not have vapoured
you could not have vapoured
he could not have vapoured
we could not have vapoured
you could not have vapoured
they could not have vapoured	I could not have been vapouring
you could not have been vapouring
he could not have been vapouring
we could not have been vapouring
you could not have been vapouring
they could not have been vapouring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I vapour?
could you vapour?
could he vapour?
could we vapour?
could you vapour?
could they vapour? 	could I be vapouring?
could you be vapouring?
could he be vapouring?
could we be vapouring?
could you be vapouring?
could they be vapouring? 	could I have vapoured?
could you have vapoured?
could he have vapoured?
could we have vapoured?
could you have vapoured?
could they have vapoured? 	could I have been vapouring?
could you have been vapouring?
could he have been vapouring?
could we have been vapouring?
could you have been vapouring?
could they have been vapouring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not vapour?
could you not vapour?
could he not vapour?
could we not vapour?
could you not vapour?
could they not vapour? 	could I not be vapouring?
could you not be vapouring?
could he not be vapouring?
could we not be vapouring?
could you not be vapouring?
could they not be vapouring? 	could I not have vapoured?
could you not have vapoured?
could he not have vapoured?
could we not have vapoured?
could you not have vapoured?
could they not have vapoured? 	could I not have been vapouring?
could you not have been vapouring?
could he not have been vapouring?
could we not have been vapouring?
could you not have been vapouring?
could they not have been vapouring?