antecedents

名词 antecedent:

1. someone from whom you are descended (but usually more remote than a grandparent)
   同义词：ancestor, ascendant, ascendent, antecedent, root
2. a preceding occurrence or cause or event
   同义词：antecedent
3. anything that precedes something similar in time
   同义词：antecedent, forerunner
4. the referent of an anaphor; a phrase or clause that is referred to by an anaphoric pronoun
   同义词：antecedent

1. That was antecedent to this event.
   那是在这件事之前。