English verb conjugation
COULD CALIBRATE

Regular verb: calibrate - calibrated - calibrated

Affirmation

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

Negation

Simple form	V-ing form
I could not calibrate you could not calibrate she could not calibrate we could not calibrate you could not calibrate they could not calibrate	I could not be calibrating you could not be calibrating she could not be calibrating we could not be calibrating you could not be calibrating they could not be calibrating
Perfect	V-ing perfect
I could not have calibrated you could not have calibrated she could not have calibrated we could not have calibrated you could not have calibrated they could not have calibrated	I could not have been calibrating you could not have been calibrating she could not have been calibrating we could not have been calibrating you could not have been calibrating they could not have been calibrating

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not calibrate? could you not calibrate? could she not calibrate? could we not calibrate? could you not calibrate? could they not calibrate?	could I not be calibrating? could you not be calibrating? could she not be calibrating? could we not be calibrating? could you not be calibrating? could they not be calibrating?
Perfect	V-ing perfect
could I not have calibrated? could you not have calibrated? could she not have calibrated? could we not have calibrated? could you not have calibrated? could they not have calibrated?	could I not have been calibrating? could you not have been calibrating? could she not have been calibrating? could we not have been calibrating? could you not have been calibrating? could they not have been calibrating?