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