I could meet you could meet he could meet we could meet you could meet they could meet
V-ing form
I could be meeting you could be meeting he could be meeting we could be meeting you could be meeting they could be meeting
Perfect
I could have met you could have met he could have met we could have met you could have met they could have met
V-ing perfect
I could have been meeting you could have been meeting he could have been meeting we could have been meeting you could have been meeting they could have been meeting
Negation
Simple form
I could not meet you could not meet he could not meet we could not meet you could not meet they could not meet
V-ing form
I could not be meeting you could not be meeting he could not be meeting we could not be meeting you could not be meeting they could not be meeting
Perfect
I could not have met you could not have met he could not have met we could not have met you could not have met they could not have met
V-ing perfect
I could not have been meeting you could not have been meeting he could not have been meeting we could not have been meeting you could not have been meeting they could not have been meeting
Interrogative form
Simple form
could I meet? could you meet? could he meet? could we meet? could you meet? could they meet?
V-ing form
could I be meeting? could you be meeting? could he be meeting? could we be meeting? could you be meeting? could they be meeting?
Perfect
could I have met? could you have met? could he have met? could we have met? could you have met? could they have met?
V-ing perfect
could I have been meeting? could you have been meeting? could he have been meeting? could we have been meeting? could you have been meeting? could they have been meeting?
Interro-negative form
Simple form
could I not meet? could you not meet? could he not meet? could we not meet? could you not meet? could they not meet?
V-ing form
could I not be meeting? could you not be meeting? could he not be meeting? could we not be meeting? could you not be meeting? could they not be meeting?
Perfect
could I not have met? could you not have met? could he not have met? could we not have met? could you not have met? could they not have met?
V-ing perfect
could I not have been meeting? could you not have been meeting? could he not have been meeting? could we not have been meeting? could you not have been meeting? could they not have been meeting?