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