I must examine you must examine she must examine we must examine you must examine they must examine
V-ing form
I must be examining you must be examining she must be examining we must be examining you must be examining they must be examining
Perfect
I must have examined you must have examined she must have examined we must have examined you must have examined they must have examined
V-ing perfect
I must have been examining you must have been examining she must have been examining we must have been examining you must have been examining they must have been examining
Negation
Simple form
I mustn't examine you mustn't examine she mustn't examine we mustn't examine you mustn't examine they mustn't examine
V-ing form
I mustn't be examining you mustn't be examining she mustn't be examining we mustn't be examining you mustn't be examining they mustn't be examining
Perfect
I mustn't have examined you mustn't have examined she mustn't have examined we mustn't have examined you mustn't have examined they mustn't have examined
V-ing perfect
I mustn't have been examining you mustn't have been examining she mustn't have been examining we mustn't have been examining you mustn't have been examining they mustn't have been examining
Interrogative form
Simple form
must I examine? must you examine? must she examine? must we examine? must you examine? must they examine?
V-ing form
must I be examining? must you be examining? must she be examining? must we be examining? must you be examining? must they be examining?
Perfect
must I have examined? must you have examined? must she have examined? must we have examined? must you have examined? must they have examined?
V-ing perfect
must I have been examining? must you have been examining? must she have been examining? must we have been examining? must you have been examining? must they have been examining?
Interro-negative form
Simple form
mustn't I examine? mustn't you examine? mustn't she examine? mustn't we examine? mustn't you examine? mustn't they examine?
V-ing form
mustn't I be examining? mustn't you be examining? mustn't she be examining? mustn't we be examining? mustn't you be examining? mustn't they be examining?
Perfect
mustn't I have examined? mustn't you have examined? mustn't she have examined? mustn't we have examined? mustn't you have examined? mustn't they have examined?
V-ing perfect
mustn't I have been examining? mustn't you have been examining? mustn't she have been examining? mustn't we have been examining? mustn't you have been examining? mustn't they have been examining?