I could live you could live he could live we could live you could live they could live
V-ing form
I could be living you could be living he could be living we could be living you could be living they could be living
Perfect
I could have lived you could have lived he 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 he could have been living we could have been living you could have been living they could have been living
Negation
Simple form
I couldn't live you couldn't live he couldn't live we couldn't live you couldn't live they couldn't live
V-ing form
I couldn't be living you couldn't be living he couldn't be living we couldn't be living you couldn't be living they couldn't be living
Perfect
I couldn't have lived you couldn't have lived he couldn't have lived we couldn't have lived you couldn't have lived they couldn't have lived
V-ing perfect
I couldn't have been living you couldn't have been living he couldn't have been living we couldn't have been living you couldn't have been living they couldn't have been living
Interrogative form
Simple form
could I live? could you live? could he live? could we live? could you live? could they live?
V-ing form
could I be living? could you be living? could he be living? could we be living? could you be living? could they be living?
Perfect
could I have lived? could you have lived? could he 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 he have been living? could we have been living? could you have been living? could they have been living?
Interro-negative form
Simple form
couldn't I live? couldn't you live? couldn't he live? couldn't we live? couldn't you live? couldn't they live?
V-ing form
couldn't I be living? couldn't you be living? couldn't he be living? couldn't we be living? couldn't you be living? couldn't they be living?
Perfect
couldn't I have lived? couldn't you have lived? couldn't he have lived? couldn't we have lived? couldn't you have lived? couldn't they have lived?
V-ing perfect
couldn't I have been living? couldn't you have been living? couldn't he have been living? couldn't we have been living? couldn't you have been living? couldn't they have been living?