I could enliven you could enliven he could enliven we could enliven you could enliven they could enliven
V-ing form
I could be enlivening you could be enlivening he could be enlivening we could be enlivening you could be enlivening they could be enlivening
Perfect
I could have enlivened you could have enlivened he could have enlivened we could have enlivened you could have enlivened they could have enlivened
V-ing perfect
I could have been enlivening you could have been enlivening he could have been enlivening we could have been enlivening you could have been enlivening they could have been enlivening
Negation
Simple form
I could not enliven you could not enliven he could not enliven we could not enliven you could not enliven they could not enliven
V-ing form
I could not be enlivening you could not be enlivening he could not be enlivening we could not be enlivening you could not be enlivening they could not be enlivening
Perfect
I could not have enlivened you could not have enlivened he could not have enlivened we could not have enlivened you could not have enlivened they could not have enlivened
V-ing perfect
I could not have been enlivening you could not have been enlivening he could not have been enlivening we could not have been enlivening you could not have been enlivening they could not have been enlivening
Interrogative form
Simple form
could I enliven? could you enliven? could he enliven? could we enliven? could you enliven? could they enliven?
V-ing form
could I be enlivening? could you be enlivening? could he be enlivening? could we be enlivening? could you be enlivening? could they be enlivening?
Perfect
could I have enlivened? could you have enlivened? could he have enlivened? could we have enlivened? could you have enlivened? could they have enlivened?
V-ing perfect
could I have been enlivening? could you have been enlivening? could he have been enlivening? could we have been enlivening? could you have been enlivening? could they have been enlivening?
Interro-negative form
Simple form
could I not enliven? could you not enliven? could he not enliven? could we not enliven? could you not enliven? could they not enliven?
V-ing form
could I not be enlivening? could you not be enlivening? could he not be enlivening? could we not be enlivening? could you not be enlivening? could they not be enlivening?
Perfect
could I not have enlivened? could you not have enlivened? could he not have enlivened? could we not have enlivened? could you not have enlivened? could they not have enlivened?
V-ing perfect
could I not have been enlivening? could you not have been enlivening? could he not have been enlivening? could we not have been enlivening? could you not have been enlivening? could they not have been enlivening?