English verb conjugation
COULD TRADE

Regular verb: trade - traded - traded

Affirmation

Simple form	V-ing form
I could trade you could trade she could trade we could trade you could trade they could trade	I could be trading you could be trading she could be trading we could be trading you could be trading they could be trading
Perfect	V-ing perfect
I could have traded you could have traded she 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 she could have been trading we could have been trading you could have been trading they could have been trading

Negation

Simple form	V-ing form
I could not trade you could not trade she 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 she could not be trading we could not be trading you could not be trading they could not be trading
Perfect	V-ing perfect
I could not have traded you could not have traded she 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 she could not have been trading we could not have been trading you could not have been trading they could not have been trading

Interrogative form

Simple form	V-ing form
could I trade? could you trade? could she trade? could we trade? could you trade? could they trade?	could I be trading? could you be trading? could she be trading? could we be trading? could you be trading? could they be trading?
Perfect	V-ing perfect
could I have traded? could you have traded? could she 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 she have been trading? could we have been trading? could you have been trading? could they have been trading?

Interro-negative form

Simple form	V-ing form
could I not trade? could you not trade? could she 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 she not be trading? could we not be trading? could you not be trading? could they not be trading?
Perfect	V-ing perfect
could I not have traded? could you not have traded? could she 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 she not have been trading? could we not have been trading? could you not have been trading? could they not have been trading?