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 must not measure you must not measure he must not measure we must not measure you must not measure they must not measure
V-ing form
I must not be measuring you must not be measuring he must not be measuring we must not be measuring you must not be measuring they must not be measuring
Perfect
I must not have measured you must not have measured he must not have measured we must not have measured you must not have measured they must not have measured
V-ing perfect
I must not have been measuring you must not have been measuring he must not have been measuring we must not have been measuring you must not have been measuring they must not 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
must I not measure? must you not measure? must he not measure? must we not measure? must you not measure? must they not measure?
V-ing form
must I not be measuring? must you not be measuring? must he not be measuring? must we not be measuring? must you not be measuring? must they not be measuring?
Perfect
must I not have measured? must you not have measured? must he not have measured? must we not have measured? must you not have measured? must they not have measured?
V-ing perfect
must I not have been measuring? must you not have been measuring? must he not have been measuring? must we not have been measuring? must you not have been measuring? must they not have been measuring?