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