I could subcharter you could subcharter he could subcharter we could subcharter you could subcharter they could subcharter
V-ing form
I could be subchartering you could be subchartering he could be subchartering we could be subchartering you could be subchartering they could be subchartering
Perfect
I could have subchartered you could have subchartered he could have subchartered we could have subchartered you could have subchartered they could have subchartered
V-ing perfect
I could have been subchartering you could have been subchartering he could have been subchartering we could have been subchartering you could have been subchartering they could have been subchartering
Negation
Simple form
I could not subcharter you could not subcharter he could not subcharter we could not subcharter you could not subcharter they could not subcharter
V-ing form
I could not be subchartering you could not be subchartering he could not be subchartering we could not be subchartering you could not be subchartering they could not be subchartering
Perfect
I could not have subchartered you could not have subchartered he could not have subchartered we could not have subchartered you could not have subchartered they could not have subchartered
V-ing perfect
I could not have been subchartering you could not have been subchartering he could not have been subchartering we could not have been subchartering you could not have been subchartering they could not have been subchartering
Interrogative form
Simple form
could I subcharter? could you subcharter? could he subcharter? could we subcharter? could you subcharter? could they subcharter?
V-ing form
could I be subchartering? could you be subchartering? could he be subchartering? could we be subchartering? could you be subchartering? could they be subchartering?
Perfect
could I have subchartered? could you have subchartered? could he have subchartered? could we have subchartered? could you have subchartered? could they have subchartered?
V-ing perfect
could I have been subchartering? could you have been subchartering? could he have been subchartering? could we have been subchartering? could you have been subchartering? could they have been subchartering?
Interro-negative form
Simple form
could I not subcharter? could you not subcharter? could he not subcharter? could we not subcharter? could you not subcharter? could they not subcharter?
V-ing form
could I not be subchartering? could you not be subchartering? could he not be subchartering? could we not be subchartering? could you not be subchartering? could they not be subchartering?
Perfect
could I not have subchartered? could you not have subchartered? could he not have subchartered? could we not have subchartered? could you not have subchartered? could they not have subchartered?
V-ing perfect
could I not have been subchartering? could you not have been subchartering? could he not have been subchartering? could we not have been subchartering? could you not have been subchartering? could they not have been subchartering?