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