I could organize you could organize he could organize we could organize you could organize they could organize
V-ing form
I could be organizing you could be organizing he could be organizing we could be organizing you could be organizing they could be organizing
Perfect
I could have organized you could have organized he could have organized we could have organized you could have organized they could have organized
V-ing perfect
I could have been organizing you could have been organizing he could have been organizing we could have been organizing you could have been organizing they could have been organizing
Negation
Simple form
I could not organize you could not organize he could not organize we could not organize you could not organize they could not organize
V-ing form
I could not be organizing you could not be organizing he could not be organizing we could not be organizing you could not be organizing they could not be organizing
Perfect
I could not have organized you could not have organized he could not have organized we could not have organized you could not have organized they could not have organized
V-ing perfect
I could not have been organizing you could not have been organizing he could not have been organizing we could not have been organizing you could not have been organizing they could not have been organizing
Interrogative form
Simple form
could I organize? could you organize? could he organize? could we organize? could you organize? could they organize?
V-ing form
could I be organizing? could you be organizing? could he be organizing? could we be organizing? could you be organizing? could they be organizing?
Perfect
could I have organized? could you have organized? could he have organized? could we have organized? could you have organized? could they have organized?
V-ing perfect
could I have been organizing? could you have been organizing? could he have been organizing? could we have been organizing? could you have been organizing? could they have been organizing?
Interro-negative form
Simple form
could I not organize? could you not organize? could he not organize? could we not organize? could you not organize? could they not organize?
V-ing form
could I not be organizing? could you not be organizing? could he not be organizing? could we not be organizing? could you not be organizing? could they not be organizing?
Perfect
could I not have organized? could you not have organized? could he not have organized? could we not have organized? could you not have organized? could they not have organized?
V-ing perfect
could I not have been organizing? could you not have been organizing? could he not have been organizing? could we not have been organizing? could you not have been organizing? could they not have been organizing?