there·to·fore /ˈðærtəˌfor, ˈðɛr, ˌfɔr; ˌðærtəˈ, ˌðɛr-/ (ad.)在那以前,到那時為止
There·to·fore adv. Up to that time; before then; -- correlative with heretofore. ◄ ►
theretofore adv : up to that time; "they had not done any work theretofore"