I could people you could people he could people we could people you could people they could people
V-ing form
I could be peopling you could be peopling he could be peopling we could be peopling you could be peopling they could be peopling
Perfect
I could have peopled you could have peopled he could have peopled we could have peopled you could have peopled they could have peopled
V-ing perfect
I could have been peopling you could have been peopling he could have been peopling we could have been peopling you could have been peopling they could have been peopling
Negation
Simple form
I could not people you could not people he could not people we could not people you could not people they could not people
V-ing form
I could not be peopling you could not be peopling he could not be peopling we could not be peopling you could not be peopling they could not be peopling
Perfect
I could not have peopled you could not have peopled he could not have peopled we could not have peopled you could not have peopled they could not have peopled
V-ing perfect
I could not have been peopling you could not have been peopling he could not have been peopling we could not have been peopling you could not have been peopling they could not have been peopling
Interrogative form
Simple form
could I people? could you people? could he people? could we people? could you people? could they people?
V-ing form
could I be peopling? could you be peopling? could he be peopling? could we be peopling? could you be peopling? could they be peopling?
Perfect
could I have peopled? could you have peopled? could he have peopled? could we have peopled? could you have peopled? could they have peopled?
V-ing perfect
could I have been peopling? could you have been peopling? could he have been peopling? could we have been peopling? could you have been peopling? could they have been peopling?
Interro-negative form
Simple form
could I not people? could you not people? could he not people? could we not people? could you not people? could they not people?
V-ing form
could I not be peopling? could you not be peopling? could he not be peopling? could we not be peopling? could you not be peopling? could they not be peopling?
Perfect
could I not have peopled? could you not have peopled? could he not have peopled? could we not have peopled? could you not have peopled? could they not have peopled?
V-ing perfect
could I not have been peopling? could you not have been peopling? could he not have been peopling? could we not have been peopling? could you not have been peopling? could they not have been peopling?