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