Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could calculate charge you could calculate charge she could calculate charge we could calculate charge you could calculate charge they could calculate charge
V-ing form
I could be calculate charging you could be calculate charging she could be calculate charging we could be calculate charging you could be calculate charging they could be calculate charging
Perfect
I could have calculate charged you could have calculate charged she could have calculate charged we could have calculate charged you could have calculate charged they could have calculate charged
V-ing perfect
I could have been calculate charging you could have been calculate charging she could have been calculate charging we could have been calculate charging you could have been calculate charging they could have been calculate charging
Negation
Simple form
I could not calculate charge you could not calculate charge she could not calculate charge we could not calculate charge you could not calculate charge they could not calculate charge
V-ing form
I could not be calculate charging you could not be calculate charging she could not be calculate charging we could not be calculate charging you could not be calculate charging they could not be calculate charging
Perfect
I could not have calculate charged you could not have calculate charged she could not have calculate charged we could not have calculate charged you could not have calculate charged they could not have calculate charged
V-ing perfect
I could not have been calculate charging you could not have been calculate charging she could not have been calculate charging we could not have been calculate charging you could not have been calculate charging they could not have been calculate charging
Interrogative form
Simple form
could I calculate charge? could you calculate charge? could she calculate charge? could we calculate charge? could you calculate charge? could they calculate charge?
V-ing form
could I be calculate charging? could you be calculate charging? could she be calculate charging? could we be calculate charging? could you be calculate charging? could they be calculate charging?
Perfect
could I have calculate charged? could you have calculate charged? could she have calculate charged? could we have calculate charged? could you have calculate charged? could they have calculate charged?
V-ing perfect
could I have been calculate charging? could you have been calculate charging? could she have been calculate charging? could we have been calculate charging? could you have been calculate charging? could they have been calculate charging?
Interro-negative form
Simple form
could I not calculate charge? could you not calculate charge? could she not calculate charge? could we not calculate charge? could you not calculate charge? could they not calculate charge?
V-ing form
could I not be calculate charging? could you not be calculate charging? could she not be calculate charging? could we not be calculate charging? could you not be calculate charging? could they not be calculate charging?
Perfect
could I not have calculate charged? could you not have calculate charged? could she not have calculate charged? could we not have calculate charged? could you not have calculate charged? could they not have calculate charged?
V-ing perfect
could I not have been calculate charging? could you not have been calculate charging? could she not have been calculate charging? could we not have been calculate charging? could you not have been calculate charging? could they not have been calculate charging?