I could reoperate you could reoperate he could reoperate we could reoperate you could reoperate they could reoperate
V-ing form
I could be reoperating you could be reoperating he could be reoperating we could be reoperating you could be reoperating they could be reoperating
Perfect
I could have reoperated you could have reoperated he could have reoperated we could have reoperated you could have reoperated they could have reoperated
V-ing perfect
I could have been reoperating you could have been reoperating he could have been reoperating we could have been reoperating you could have been reoperating they could have been reoperating
Negation
Simple form
I could not reoperate you could not reoperate he could not reoperate we could not reoperate you could not reoperate they could not reoperate
V-ing form
I could not be reoperating you could not be reoperating he could not be reoperating we could not be reoperating you could not be reoperating they could not be reoperating
Perfect
I could not have reoperated you could not have reoperated he could not have reoperated we could not have reoperated you could not have reoperated they could not have reoperated
V-ing perfect
I could not have been reoperating you could not have been reoperating he could not have been reoperating we could not have been reoperating you could not have been reoperating they could not have been reoperating
Interrogative form
Simple form
could I reoperate? could you reoperate? could he reoperate? could we reoperate? could you reoperate? could they reoperate?
V-ing form
could I be reoperating? could you be reoperating? could he be reoperating? could we be reoperating? could you be reoperating? could they be reoperating?
Perfect
could I have reoperated? could you have reoperated? could he have reoperated? could we have reoperated? could you have reoperated? could they have reoperated?
V-ing perfect
could I have been reoperating? could you have been reoperating? could he have been reoperating? could we have been reoperating? could you have been reoperating? could they have been reoperating?
Interro-negative form
Simple form
could I not reoperate? could you not reoperate? could he not reoperate? could we not reoperate? could you not reoperate? could they not reoperate?
V-ing form
could I not be reoperating? could you not be reoperating? could he not be reoperating? could we not be reoperating? could you not be reoperating? could they not be reoperating?
Perfect
could I not have reoperated? could you not have reoperated? could he not have reoperated? could we not have reoperated? could you not have reoperated? could they not have reoperated?
V-ing perfect
could I not have been reoperating? could you not have been reoperating? could he not have been reoperating? could we not have been reoperating? could you not have been reoperating? could they not have been reoperating?