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