must calibrate
Verbo regular: calibrate - calibrated- calibrated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not calibrate
you must not calibrate
she must not calibrate
we must not calibrate
you must not calibrate
they must not calibrate 	I must not be calibrating
you must not be calibrating
she must not be calibrating
we must not be calibrating
you must not be calibrating
they must not be calibrating	I must not have calibrated
you must not have calibrated
she must not have calibrated
we must not have calibrated
you must not have calibrated
they must not have calibrated	I must not have been calibrating
you must not have been calibrating
she must not have been calibrating
we must not have been calibrating
you must not have been calibrating
they must not have been calibrating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not calibrate?
must you not calibrate?
must she not calibrate?
must we not calibrate?
must you not calibrate?
must they not calibrate? 	must I not be calibrating?
must you not be calibrating?
must she not be calibrating?
must we not be calibrating?
must you not be calibrating?
must they not be calibrating? 	must I not have calibrated?
must you not have calibrated?
must she not have calibrated?
must we not have calibrated?
must you not have calibrated?
must they not have calibrated? 	must I not have been calibrating?
must you not have been calibrating?
must she not have been calibrating?
must we not have been calibrating?
must you not have been calibrating?
must they not have been calibrating?