I must initiate you must initiate she must initiate we must initiate you must initiate they must initiate
V-ing form
I must be initiating you must be initiating she must be initiating we must be initiating you must be initiating they must be initiating
Perfect
I must have initiated you must have initiated she 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 she 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 she 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 she 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 she 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 she 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 she initiate? must we initiate? must you initiate? must they initiate?
V-ing form
must I be initiating? must you be initiating? must she be initiating? must we be initiating? must you be initiating? must they be initiating?
Perfect
must I have initiated? must you have initiated? must she 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 she 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 she 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 she 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 she 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 she have been initiating? mustn't we have been initiating? mustn't you have been initiating? mustn't they have been initiating?