I could overextend you could overextend he could overextend we could overextend you could overextend they could overextend
V-ing form
I could be overextending you could be overextending he could be overextending we could be overextending you could be overextending they could be overextending
Perfect
I could have overextended you could have overextended he could have overextended we could have overextended you could have overextended they could have overextended
V-ing perfect
I could have been overextending you could have been overextending he could have been overextending we could have been overextending you could have been overextending they could have been overextending
Negation
Simple form
I could not overextend you could not overextend he could not overextend we could not overextend you could not overextend they could not overextend
V-ing form
I could not be overextending you could not be overextending he could not be overextending we could not be overextending you could not be overextending they could not be overextending
Perfect
I could not have overextended you could not have overextended he could not have overextended we could not have overextended you could not have overextended they could not have overextended
V-ing perfect
I could not have been overextending you could not have been overextending he could not have been overextending we could not have been overextending you could not have been overextending they could not have been overextending
Interrogative form
Simple form
could I overextend? could you overextend? could he overextend? could we overextend? could you overextend? could they overextend?
V-ing form
could I be overextending? could you be overextending? could he be overextending? could we be overextending? could you be overextending? could they be overextending?
Perfect
could I have overextended? could you have overextended? could he have overextended? could we have overextended? could you have overextended? could they have overextended?
V-ing perfect
could I have been overextending? could you have been overextending? could he have been overextending? could we have been overextending? could you have been overextending? could they have been overextending?
Interro-negative form
Simple form
could I not overextend? could you not overextend? could he not overextend? could we not overextend? could you not overextend? could they not overextend?
V-ing form
could I not be overextending? could you not be overextending? could he not be overextending? could we not be overextending? could you not be overextending? could they not be overextending?
Perfect
could I not have overextended? could you not have overextended? could he not have overextended? could we not have overextended? could you not have overextended? could they not have overextended?
V-ing perfect
could I not have been overextending? could you not have been overextending? could he not have been overextending? could we not have been overextending? could you not have been overextending? could they not have been overextending?