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 couldn't consume you couldn't consume she couldn't consume we couldn't consume you couldn't consume they couldn't consume
V-ing form
I couldn't be consuming you couldn't be consuming she couldn't be consuming we couldn't be consuming you couldn't be consuming they couldn't be consuming
Perfect
I couldn't have consumed you couldn't have consumed she couldn't have consumed we couldn't have consumed you couldn't have consumed they couldn't have consumed
V-ing perfect
I couldn't have been consuming you couldn't have been consuming she couldn't have been consuming we couldn't have been consuming you couldn't have been consuming they couldn't 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
couldn't I consume? couldn't you consume? couldn't she consume? couldn't we consume? couldn't you consume? couldn't they consume?
V-ing form
couldn't I be consuming? couldn't you be consuming? couldn't she be consuming? couldn't we be consuming? couldn't you be consuming? couldn't they be consuming?
Perfect
couldn't I have consumed? couldn't you have consumed? couldn't she have consumed? couldn't we have consumed? couldn't you have consumed? couldn't they have consumed?
V-ing perfect
couldn't I have been consuming? couldn't you have been consuming? couldn't she have been consuming? couldn't we have been consuming? couldn't you have been consuming? couldn't they have been consuming?