I could live you could live she could live we could live you could live they could live
V-ing form
I could be living you could be living she could be living we could be living you could be living they could be living
Perfect
I could have lived you could have lived she could have lived we could have lived you could have lived they could have lived
V-ing perfect
I could have been living you could have been living she could have been living we could have been living you could have been living they could have been living
Negation
Simple form
I could not live you could not live she could not live we could not live you could not live they could not live
V-ing form
I could not be living you could not be living she could not be living we could not be living you could not be living they could not be living
Perfect
I could not have lived you could not have lived she could not have lived we could not have lived you could not have lived they could not have lived
V-ing perfect
I could not have been living you could not have been living she could not have been living we could not have been living you could not have been living they could not have been living
Interrogative form
Simple form
could I live? could you live? could she live? could we live? could you live? could they live?
V-ing form
could I be living? could you be living? could she be living? could we be living? could you be living? could they be living?
Perfect
could I have lived? could you have lived? could she have lived? could we have lived? could you have lived? could they have lived?
V-ing perfect
could I have been living? could you have been living? could she have been living? could we have been living? could you have been living? could they have been living?
Interro-negative form
Simple form
could I not live? could you not live? could she not live? could we not live? could you not live? could they not live?
V-ing form
could I not be living? could you not be living? could she not be living? could we not be living? could you not be living? could they not be living?
Perfect
could I not have lived? could you not have lived? could she not have lived? could we not have lived? could you not have lived? could they not have lived?
V-ing perfect
could I not have been living? could you not have been living? could she not have been living? could we not have been living? could you not have been living? could they not have been living?