I could mad you could mad she could mad we could mad you could mad they could mad
V-ing form
I could be mading you could be mading she could be mading we could be mading you could be mading they could be mading
Perfect
I could have maded you could have maded she could have maded we could have maded you could have maded they could have maded
V-ing perfect
I could have been mading you could have been mading she could have been mading we could have been mading you could have been mading they could have been mading
Negation
Simple form
I could not mad you could not mad she could not mad we could not mad you could not mad they could not mad
V-ing form
I could not be mading you could not be mading she could not be mading we could not be mading you could not be mading they could not be mading
Perfect
I could not have maded you could not have maded she could not have maded we could not have maded you could not have maded they could not have maded
V-ing perfect
I could not have been mading you could not have been mading she could not have been mading we could not have been mading you could not have been mading they could not have been mading
Interrogative form
Simple form
could I mad? could you mad? could she mad? could we mad? could you mad? could they mad?
V-ing form
could I be mading? could you be mading? could she be mading? could we be mading? could you be mading? could they be mading?
Perfect
could I have maded? could you have maded? could she have maded? could we have maded? could you have maded? could they have maded?
V-ing perfect
could I have been mading? could you have been mading? could she have been mading? could we have been mading? could you have been mading? could they have been mading?
Interro-negative form
Simple form
could I not mad? could you not mad? could she not mad? could we not mad? could you not mad? could they not mad?
V-ing form
could I not be mading? could you not be mading? could she not be mading? could we not be mading? could you not be mading? could they not be mading?
Perfect
could I not have maded? could you not have maded? could she not have maded? could we not have maded? could you not have maded? could they not have maded?
V-ing perfect
could I not have been mading? could you not have been mading? could she not have been mading? could we not have been mading? could you not have been mading? could they not have been mading?