I could revive you could revive she could revive we could revive you could revive they could revive
V-ing form
I could be reviving you could be reviving she could be reviving we could be reviving you could be reviving they could be reviving
Perfect
I could have revived you could have revived she could have revived we could have revived you could have revived they could have revived
V-ing perfect
I could have been reviving you could have been reviving she could have been reviving we could have been reviving you could have been reviving they could have been reviving
Negation
Simple form
I could not revive you could not revive she could not revive we could not revive you could not revive they could not revive
V-ing form
I could not be reviving you could not be reviving she could not be reviving we could not be reviving you could not be reviving they could not be reviving
Perfect
I could not have revived you could not have revived she could not have revived we could not have revived you could not have revived they could not have revived
V-ing perfect
I could not have been reviving you could not have been reviving she could not have been reviving we could not have been reviving you could not have been reviving they could not have been reviving
Interrogative form
Simple form
could I revive? could you revive? could she revive? could we revive? could you revive? could they revive?
V-ing form
could I be reviving? could you be reviving? could she be reviving? could we be reviving? could you be reviving? could they be reviving?
Perfect
could I have revived? could you have revived? could she have revived? could we have revived? could you have revived? could they have revived?
V-ing perfect
could I have been reviving? could you have been reviving? could she have been reviving? could we have been reviving? could you have been reviving? could they have been reviving?
Interro-negative form
Simple form
could I not revive? could you not revive? could she not revive? could we not revive? could you not revive? could they not revive?
V-ing form
could I not be reviving? could you not be reviving? could she not be reviving? could we not be reviving? could you not be reviving? could they not be reviving?
Perfect
could I not have revived? could you not have revived? could she not have revived? could we not have revived? could you not have revived? could they not have revived?
V-ing perfect
could I not have been reviving? could you not have been reviving? could she not have been reviving? could we not have been reviving? could you not have been reviving? could they not have been reviving?