I must trade you must trade he must trade we must trade you must trade they must trade
V-ing form
I must be trading you must be trading he must be trading we must be trading you must be trading they must be trading
Perfect
I must have traded you must have traded he must have traded we must have traded you must have traded they must have traded
V-ing perfect
I must have been trading you must have been trading he must have been trading we must have been trading you must have been trading they must have been trading
Negation
Simple form
I must not trade you must not trade he must not trade we must not trade you must not trade they must not trade
V-ing form
I must not be trading you must not be trading he must not be trading we must not be trading you must not be trading they must not be trading
Perfect
I must not have traded you must not have traded he must not have traded we must not have traded you must not have traded they must not have traded
V-ing perfect
I must not have been trading you must not have been trading he must not have been trading we must not have been trading you must not have been trading they must not have been trading
Interrogative form
Simple form
must I trade? must you trade? must he trade? must we trade? must you trade? must they trade?
V-ing form
must I be trading? must you be trading? must he be trading? must we be trading? must you be trading? must they be trading?
Perfect
must I have traded? must you have traded? must he have traded? must we have traded? must you have traded? must they have traded?
V-ing perfect
must I have been trading? must you have been trading? must he have been trading? must we have been trading? must you have been trading? must they have been trading?
Interro-negative form
Simple form
must I not trade? must you not trade? must he not trade? must we not trade? must you not trade? must they not trade?
V-ing form
must I not be trading? must you not be trading? must he not be trading? must we not be trading? must you not be trading? must they not be trading?
Perfect
must I not have traded? must you not have traded? must he not have traded? must we not have traded? must you not have traded? must they not have traded?
V-ing perfect
must I not have been trading? must you not have been trading? must he not have been trading? must we not have been trading? must you not have been trading? must they not have been trading?