I could photocoagulate you could photocoagulate she could photocoagulate we could photocoagulate you could photocoagulate they could photocoagulate
V-ing form
I could be photocoagulating you could be photocoagulating she could be photocoagulating we could be photocoagulating you could be photocoagulating they could be photocoagulating
Perfect
I could have photocoagulated you could have photocoagulated she could have photocoagulated we could have photocoagulated you could have photocoagulated they could have photocoagulated
V-ing perfect
I could have been photocoagulating you could have been photocoagulating she could have been photocoagulating we could have been photocoagulating you could have been photocoagulating they could have been photocoagulating
Negation
Simple form
I could not photocoagulate you could not photocoagulate she could not photocoagulate we could not photocoagulate you could not photocoagulate they could not photocoagulate
V-ing form
I could not be photocoagulating you could not be photocoagulating she could not be photocoagulating we could not be photocoagulating you could not be photocoagulating they could not be photocoagulating
Perfect
I could not have photocoagulated you could not have photocoagulated she could not have photocoagulated we could not have photocoagulated you could not have photocoagulated they could not have photocoagulated
V-ing perfect
I could not have been photocoagulating you could not have been photocoagulating she could not have been photocoagulating we could not have been photocoagulating you could not have been photocoagulating they could not have been photocoagulating
Interrogative form
Simple form
could I photocoagulate? could you photocoagulate? could she photocoagulate? could we photocoagulate? could you photocoagulate? could they photocoagulate?
V-ing form
could I be photocoagulating? could you be photocoagulating? could she be photocoagulating? could we be photocoagulating? could you be photocoagulating? could they be photocoagulating?
Perfect
could I have photocoagulated? could you have photocoagulated? could she have photocoagulated? could we have photocoagulated? could you have photocoagulated? could they have photocoagulated?
V-ing perfect
could I have been photocoagulating? could you have been photocoagulating? could she have been photocoagulating? could we have been photocoagulating? could you have been photocoagulating? could they have been photocoagulating?
Interro-negative form
Simple form
could I not photocoagulate? could you not photocoagulate? could she not photocoagulate? could we not photocoagulate? could you not photocoagulate? could they not photocoagulate?
V-ing form
could I not be photocoagulating? could you not be photocoagulating? could she not be photocoagulating? could we not be photocoagulating? could you not be photocoagulating? could they not be photocoagulating?
Perfect
could I not have photocoagulated? could you not have photocoagulated? could she not have photocoagulated? could we not have photocoagulated? could you not have photocoagulated? could they not have photocoagulated?
V-ing perfect
could I not have been photocoagulating? could you not have been photocoagulating? could she not have been photocoagulating? could we not have been photocoagulating? could you not have been photocoagulating? could they not have been photocoagulating?