must calibrate
Regular verb: calibrate - calibrated- calibrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must calibrate
you must calibrate
she must calibrate
we must calibrate
you must calibrate
they must calibrate 	I must be calibrating
you must be calibrating
she must be calibrating
we must be calibrating
you must be calibrating
they must be calibrating	I must have calibrated
you must have calibrated
she must have calibrated
we must have calibrated
you must have calibrated
they must have calibrated	I must have been calibrating
you must have been calibrating
she must have been calibrating
we must have been calibrating
you must have been calibrating
they must have been calibrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't calibrate
you mustn't calibrate
she mustn't calibrate
we mustn't calibrate
you mustn't calibrate
they mustn't calibrate 	I mustn't be calibrating
you mustn't be calibrating
she mustn't be calibrating
we mustn't be calibrating
you mustn't be calibrating
they mustn't be calibrating	I mustn't have calibrated
you mustn't have calibrated
she mustn't have calibrated
we mustn't have calibrated
you mustn't have calibrated
they mustn't have calibrated	I mustn't have been calibrating
you mustn't have been calibrating
she mustn't have been calibrating
we mustn't have been calibrating
you mustn't have been calibrating
they mustn't have been calibrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I calibrate?
must you calibrate?
must she calibrate?
must we calibrate?
must you calibrate?
must they calibrate? 	must I be calibrating?
must you be calibrating?
must she be calibrating?
must we be calibrating?
must you be calibrating?
must they be calibrating? 	must I have calibrated?
must you have calibrated?
must she have calibrated?
must we have calibrated?
must you have calibrated?
must they have calibrated? 	must I have been calibrating?
must you have been calibrating?
must she have been calibrating?
must we have been calibrating?
must you have been calibrating?
must they have been calibrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I calibrate?
mustn't you calibrate?
mustn't she calibrate?
mustn't we calibrate?
mustn't you calibrate?
mustn't they calibrate? 	mustn't I be calibrating?
mustn't you be calibrating?
mustn't she be calibrating?
mustn't we be calibrating?
mustn't you be calibrating?
mustn't they be calibrating? 	mustn't I have calibrated?
mustn't you have calibrated?
mustn't she have calibrated?
mustn't we have calibrated?
mustn't you have calibrated?
mustn't they have calibrated? 	mustn't I have been calibrating?
mustn't you have been calibrating?
mustn't she have been calibrating?
mustn't we have been calibrating?
mustn't you have been calibrating?
mustn't they have been calibrating?