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