I could consume you could consume she could consume we could consume you could consume they could consume
V-ing form
I could be consuming you could be consuming she could be consuming we could be consuming you could be consuming they could be consuming
Perfect
I could have consumed you could have consumed she could have consumed we could have consumed you could have consumed they could have consumed
V-ing perfect
I could have been consuming you could have been consuming she could have been consuming we could have been consuming you could have been consuming they could have been consuming
Negation
Simple form
I could not consume you could not consume she could not consume we could not consume you could not consume they could not consume
V-ing form
I could not be consuming you could not be consuming she could not be consuming we could not be consuming you could not be consuming they could not be consuming
Perfect
I could not have consumed you could not have consumed she could not have consumed we could not have consumed you could not have consumed they could not have consumed
V-ing perfect
I could not have been consuming you could not have been consuming she could not have been consuming we could not have been consuming you could not have been consuming they could not have been consuming
Interrogative form
Simple form
could I consume? could you consume? could she consume? could we consume? could you consume? could they consume?
V-ing form
could I be consuming? could you be consuming? could she be consuming? could we be consuming? could you be consuming? could they be consuming?
Perfect
could I have consumed? could you have consumed? could she have consumed? could we have consumed? could you have consumed? could they have consumed?
V-ing perfect
could I have been consuming? could you have been consuming? could she have been consuming? could we have been consuming? could you have been consuming? could they have been consuming?
Interro-negative form
Simple form
could I not consume? could you not consume? could she not consume? could we not consume? could you not consume? could they not consume?
V-ing form
could I not be consuming? could you not be consuming? could she not be consuming? could we not be consuming? could you not be consuming? could they not be consuming?
Perfect
could I not have consumed? could you not have consumed? could she not have consumed? could we not have consumed? could you not have consumed? could they not have consumed?
V-ing perfect
could I not have been consuming? could you not have been consuming? could she not have been consuming? could we not have been consuming? could you not have been consuming? could they not have been consuming?