1) Antedate 2) Be there already 3) Come beforehand 4) Exist 5) To exist beforehand 6) To exist in a previous state 
• (v. i.) To exist previously; to exist before something else.
Pre`ëx·ist' intransitive verb [ imperfect & past participle Preëxisted ; present participle & verbal noun Preëxisting .] To exist previously; to exist before something else. 
[v] - exist beforehand or prior to a certain point in time
to exist beforehand. · to exist in a previous state.