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