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