could calibrate
Verbo regolare: calibrate - calibrated- calibrated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could calibrate
you could calibrate
he could calibrate
we could calibrate
you could calibrate
they could calibrate 	I could be calibrating
you could be calibrating
he could be calibrating
we could be calibrating
you could be calibrating
they could be calibrating	I could have calibrated
you could have calibrated
he could have calibrated
we could have calibrated
you could have calibrated
they could have calibrated	I could have been calibrating
you could have been calibrating
he could have been calibrating
we could have been calibrating
you could have been calibrating
they could have been calibrating	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't calibrate
you couldn't calibrate
he couldn't calibrate
we couldn't calibrate
you couldn't calibrate
they couldn't calibrate 	I couldn't be calibrating
you couldn't be calibrating
he couldn't be calibrating
we couldn't be calibrating
you couldn't be calibrating
they couldn't be calibrating	I couldn't have calibrated
you couldn't have calibrated
he couldn't have calibrated
we couldn't have calibrated
you couldn't have calibrated
they couldn't have calibrated	I couldn't have been calibrating
you couldn't have been calibrating
he couldn't have been calibrating
we couldn't have been calibrating
you couldn't have been calibrating
they couldn't have been calibrating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I calibrate?
could you calibrate?
could he calibrate?
could we calibrate?
could you calibrate?
could they calibrate? 	could I be calibrating?
could you be calibrating?
could he be calibrating?
could we be calibrating?
could you be calibrating?
could they be calibrating? 	could I have calibrated?
could you have calibrated?
could he have calibrated?
could we have calibrated?
could you have calibrated?
could they have calibrated? 	could I have been calibrating?
could you have been calibrating?
could he have been calibrating?
could we have been calibrating?
could you have been calibrating?
could they have been calibrating? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I calibrate?
couldn't you calibrate?
couldn't he calibrate?
couldn't we calibrate?
couldn't you calibrate?
couldn't they calibrate? 	couldn't I be calibrating?
couldn't you be calibrating?
couldn't he be calibrating?
couldn't we be calibrating?
couldn't you be calibrating?
couldn't they be calibrating? 	couldn't I have calibrated?
couldn't you have calibrated?
couldn't he have calibrated?
couldn't we have calibrated?
couldn't you have calibrated?
couldn't they have calibrated? 	couldn't I have been calibrating?
couldn't you have been calibrating?
couldn't he have been calibrating?
couldn't we have been calibrating?
couldn't you have been calibrating?
couldn't they have been calibrating?