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