I must fast-talk you must fast-talk he must fast-talk we must fast-talk you must fast-talk they must fast-talk
V-ing form
I must be fast-talking you must be fast-talking he must be fast-talking we must be fast-talking you must be fast-talking they must be fast-talking
Perfect
I must have fast-talked you must have fast-talked he must have fast-talked we must have fast-talked you must have fast-talked they must have fast-talked
V-ing perfect
I must have been fast-talking you must have been fast-talking he must have been fast-talking we must have been fast-talking you must have been fast-talking they must have been fast-talking
Negation
Simple form
I mustn't fast-talk you mustn't fast-talk he mustn't fast-talk we mustn't fast-talk you mustn't fast-talk they mustn't fast-talk
V-ing form
I mustn't be fast-talking you mustn't be fast-talking he mustn't be fast-talking we mustn't be fast-talking you mustn't be fast-talking they mustn't be fast-talking
Perfect
I mustn't have fast-talked you mustn't have fast-talked he mustn't have fast-talked we mustn't have fast-talked you mustn't have fast-talked they mustn't have fast-talked
V-ing perfect
I mustn't have been fast-talking you mustn't have been fast-talking he mustn't have been fast-talking we mustn't have been fast-talking you mustn't have been fast-talking they mustn't have been fast-talking
Interrogative form
Simple form
must I fast-talk? must you fast-talk? must he fast-talk? must we fast-talk? must you fast-talk? must they fast-talk?
V-ing form
must I be fast-talking? must you be fast-talking? must he be fast-talking? must we be fast-talking? must you be fast-talking? must they be fast-talking?
Perfect
must I have fast-talked? must you have fast-talked? must he have fast-talked? must we have fast-talked? must you have fast-talked? must they have fast-talked?
V-ing perfect
must I have been fast-talking? must you have been fast-talking? must he have been fast-talking? must we have been fast-talking? must you have been fast-talking? must they have been fast-talking?
Interro-negative form
Simple form
mustn't I fast-talk? mustn't you fast-talk? mustn't he fast-talk? mustn't we fast-talk? mustn't you fast-talk? mustn't they fast-talk?
V-ing form
mustn't I be fast-talking? mustn't you be fast-talking? mustn't he be fast-talking? mustn't we be fast-talking? mustn't you be fast-talking? mustn't they be fast-talking?
Perfect
mustn't I have fast-talked? mustn't you have fast-talked? mustn't he have fast-talked? mustn't we have fast-talked? mustn't you have fast-talked? mustn't they have fast-talked?
V-ing perfect
mustn't I have been fast-talking? mustn't you have been fast-talking? mustn't he have been fast-talking? mustn't we have been fast-talking? mustn't you have been fast-talking? mustn't they have been fast-talking?