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