I could enliven you could enliven she could enliven we could enliven you could enliven they could enliven
V-ing form
I could be enlivening you could be enlivening she could be enlivening we could be enlivening you could be enlivening they could be enlivening
Perfect
I could have enlivened you could have enlivened she 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 she could have been enlivening we could have been enlivening you could have been enlivening they could have been enlivening
Negation
Simple form
I couldn't enliven you couldn't enliven she couldn't enliven we couldn't enliven you couldn't enliven they couldn't enliven
V-ing form
I couldn't be enlivening you couldn't be enlivening she couldn't be enlivening we couldn't be enlivening you couldn't be enlivening they couldn't be enlivening
Perfect
I couldn't have enlivened you couldn't have enlivened she couldn't have enlivened we couldn't have enlivened you couldn't have enlivened they couldn't have enlivened
V-ing perfect
I couldn't have been enlivening you couldn't have been enlivening she couldn't have been enlivening we couldn't have been enlivening you couldn't have been enlivening they couldn't have been enlivening
Interrogative form
Simple form
could I enliven? could you enliven? could she enliven? could we enliven? could you enliven? could they enliven?
V-ing form
could I be enlivening? could you be enlivening? could she be enlivening? could we be enlivening? could you be enlivening? could they be enlivening?
Perfect
could I have enlivened? could you have enlivened? could she 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 she have been enlivening? could we have been enlivening? could you have been enlivening? could they have been enlivening?
Interro-negative form
Simple form
couldn't I enliven? couldn't you enliven? couldn't she enliven? couldn't we enliven? couldn't you enliven? couldn't they enliven?
V-ing form
couldn't I be enlivening? couldn't you be enlivening? couldn't she be enlivening? couldn't we be enlivening? couldn't you be enlivening? couldn't they be enlivening?
Perfect
couldn't I have enlivened? couldn't you have enlivened? couldn't she have enlivened? couldn't we have enlivened? couldn't you have enlivened? couldn't they have enlivened?
V-ing perfect
couldn't I have been enlivening? couldn't you have been enlivening? couldn't she have been enlivening? couldn't we have been enlivening? couldn't you have been enlivening? couldn't they have been enlivening?