I must destroy you must destroy he must destroy we must destroy you must destroy they must destroy
V-ing form
I must be destroying you must be destroying he must be destroying we must be destroying you must be destroying they must be destroying
Perfect
I must have destroyed you must have destroyed he must have destroyed we must have destroyed you must have destroyed they must have destroyed
V-ing perfect
I must have been destroying you must have been destroying he must have been destroying we must have been destroying you must have been destroying they must have been destroying
Negation
Simple form
I mustn't destroy you mustn't destroy he mustn't destroy we mustn't destroy you mustn't destroy they mustn't destroy
V-ing form
I mustn't be destroying you mustn't be destroying he mustn't be destroying we mustn't be destroying you mustn't be destroying they mustn't be destroying
Perfect
I mustn't have destroyed you mustn't have destroyed he mustn't have destroyed we mustn't have destroyed you mustn't have destroyed they mustn't have destroyed
V-ing perfect
I mustn't have been destroying you mustn't have been destroying he mustn't have been destroying we mustn't have been destroying you mustn't have been destroying they mustn't have been destroying
Interrogative form
Simple form
must I destroy? must you destroy? must he destroy? must we destroy? must you destroy? must they destroy?
V-ing form
must I be destroying? must you be destroying? must he be destroying? must we be destroying? must you be destroying? must they be destroying?
Perfect
must I have destroyed? must you have destroyed? must he have destroyed? must we have destroyed? must you have destroyed? must they have destroyed?
V-ing perfect
must I have been destroying? must you have been destroying? must he have been destroying? must we have been destroying? must you have been destroying? must they have been destroying?
Interro-negative form
Simple form
mustn't I destroy? mustn't you destroy? mustn't he destroy? mustn't we destroy? mustn't you destroy? mustn't they destroy?
V-ing form
mustn't I be destroying? mustn't you be destroying? mustn't he be destroying? mustn't we be destroying? mustn't you be destroying? mustn't they be destroying?
Perfect
mustn't I have destroyed? mustn't you have destroyed? mustn't he have destroyed? mustn't we have destroyed? mustn't you have destroyed? mustn't they have destroyed?
V-ing perfect
mustn't I have been destroying? mustn't you have been destroying? mustn't he have been destroying? mustn't we have been destroying? mustn't you have been destroying? mustn't they have been destroying?