I could administrate you could administrate she could administrate we could administrate you could administrate they could administrate
V-ing form
I could be administrating you could be administrating she could be administrating we could be administrating you could be administrating they could be administrating
Perfect
I could have administrated you could have administrated she 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 she 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 she 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 she 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 she 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 she 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 she administrate? could we administrate? could you administrate? could they administrate?
V-ing form
could I be administrating? could you be administrating? could she be administrating? could we be administrating? could you be administrating? could they be administrating?
Perfect
could I have administrated? could you have administrated? could she 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 she 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 she 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 she 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 she 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 she have been administrating? couldn't we have been administrating? couldn't you have been administrating? couldn't they have been administrating?