could trade
Verbo regular: trade - traded- traded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could trade
you could trade
he could trade
we could trade
you could trade
they could trade 	I could be trading
you could be trading
he could be trading
we could be trading
you could be trading
they could be trading	I could have traded
you could have traded
he could have traded
we could have traded
you could have traded
they could have traded	I could have been trading
you could have been trading
he could have been trading
we could have been trading
you could have been trading
they could have been trading	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not trade
you could not trade
he could not trade
we could not trade
you could not trade
they could not trade 	I could not be trading
you could not be trading
he could not be trading
we could not be trading
you could not be trading
they could not be trading	I could not have traded
you could not have traded
he could not have traded
we could not have traded
you could not have traded
they could not have traded	I could not have been trading
you could not have been trading
he could not have been trading
we could not have been trading
you could not have been trading
they could not have been trading	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I trade?
could you trade?
could he trade?
could we trade?
could you trade?
could they trade? 	could I be trading?
could you be trading?
could he be trading?
could we be trading?
could you be trading?
could they be trading? 	could I have traded?
could you have traded?
could he have traded?
could we have traded?
could you have traded?
could they have traded? 	could I have been trading?
could you have been trading?
could he have been trading?
could we have been trading?
could you have been trading?
could they have been trading? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not trade?
could you not trade?
could he not trade?
could we not trade?
could you not trade?
could they not trade? 	could I not be trading?
could you not be trading?
could he not be trading?
could we not be trading?
could you not be trading?
could they not be trading? 	could I not have traded?
could you not have traded?
could he not have traded?
could we not have traded?
could you not have traded?
could they not have traded? 	could I not have been trading?
could you not have been trading?
could he not have been trading?
could we not have been trading?
could you not have been trading?
could they not have been trading?