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