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