I could demolish you could demolish he could demolish we could demolish you could demolish they could demolish
V-ing form
I could be demolishing you could be demolishing he could be demolishing we could be demolishing you could be demolishing they could be demolishing
Perfect
I could have demolished you could have demolished he could have demolished we could have demolished you could have demolished they could have demolished
V-ing perfect
I could have been demolishing you could have been demolishing he could have been demolishing we could have been demolishing you could have been demolishing they could have been demolishing
Negation
Simple form
I could not demolish you could not demolish he could not demolish we could not demolish you could not demolish they could not demolish
V-ing form
I could not be demolishing you could not be demolishing he could not be demolishing we could not be demolishing you could not be demolishing they could not be demolishing
Perfect
I could not have demolished you could not have demolished he could not have demolished we could not have demolished you could not have demolished they could not have demolished
V-ing perfect
I could not have been demolishing you could not have been demolishing he could not have been demolishing we could not have been demolishing you could not have been demolishing they could not have been demolishing
Interrogative form
Simple form
could I demolish? could you demolish? could he demolish? could we demolish? could you demolish? could they demolish?
V-ing form
could I be demolishing? could you be demolishing? could he be demolishing? could we be demolishing? could you be demolishing? could they be demolishing?
Perfect
could I have demolished? could you have demolished? could he have demolished? could we have demolished? could you have demolished? could they have demolished?
V-ing perfect
could I have been demolishing? could you have been demolishing? could he have been demolishing? could we have been demolishing? could you have been demolishing? could they have been demolishing?
Interro-negative form
Simple form
could I not demolish? could you not demolish? could he not demolish? could we not demolish? could you not demolish? could they not demolish?
V-ing form
could I not be demolishing? could you not be demolishing? could he not be demolishing? could we not be demolishing? could you not be demolishing? could they not be demolishing?
Perfect
could I not have demolished? could you not have demolished? could he not have demolished? could we not have demolished? could you not have demolished? could they not have demolished?
V-ing perfect
could I not have been demolishing? could you not have been demolishing? could he not have been demolishing? could we not have been demolishing? could you not have been demolishing? could they not have been demolishing?