I could suppurate you could suppurate he could suppurate we could suppurate you could suppurate they could suppurate
V-ing form
I could be suppurating you could be suppurating he could be suppurating we could be suppurating you could be suppurating they could be suppurating
Perfect
I could have suppurated you could have suppurated he could have suppurated we could have suppurated you could have suppurated they could have suppurated
V-ing perfect
I could have been suppurating you could have been suppurating he could have been suppurating we could have been suppurating you could have been suppurating they could have been suppurating
Negation
Simple form
I could not suppurate you could not suppurate he could not suppurate we could not suppurate you could not suppurate they could not suppurate
V-ing form
I could not be suppurating you could not be suppurating he could not be suppurating we could not be suppurating you could not be suppurating they could not be suppurating
Perfect
I could not have suppurated you could not have suppurated he could not have suppurated we could not have suppurated you could not have suppurated they could not have suppurated
V-ing perfect
I could not have been suppurating you could not have been suppurating he could not have been suppurating we could not have been suppurating you could not have been suppurating they could not have been suppurating
Interrogative form
Simple form
could I suppurate? could you suppurate? could he suppurate? could we suppurate? could you suppurate? could they suppurate?
V-ing form
could I be suppurating? could you be suppurating? could he be suppurating? could we be suppurating? could you be suppurating? could they be suppurating?
Perfect
could I have suppurated? could you have suppurated? could he have suppurated? could we have suppurated? could you have suppurated? could they have suppurated?
V-ing perfect
could I have been suppurating? could you have been suppurating? could he have been suppurating? could we have been suppurating? could you have been suppurating? could they have been suppurating?
Interro-negative form
Simple form
could I not suppurate? could you not suppurate? could he not suppurate? could we not suppurate? could you not suppurate? could they not suppurate?
V-ing form
could I not be suppurating? could you not be suppurating? could he not be suppurating? could we not be suppurating? could you not be suppurating? could they not be suppurating?
Perfect
could I not have suppurated? could you not have suppurated? could he not have suppurated? could we not have suppurated? could you not have suppurated? could they not have suppurated?
V-ing perfect
could I not have been suppurating? could you not have been suppurating? could he not have been suppurating? could we not have been suppurating? could you not have been suppurating? could they not have been suppurating?