pre - 向前，
ante - 也代表向前
re-往后，回
retro-往后，回
inter-中间，来回
ex-
pro-
or-表人，而且代表层次较高的人
- precede=pre+ced+e
- preceding=pre+ced+ing
- precedent=pre+ced+ent
- precedented=pre+ced+ent+ed
- unprecedented=un+pre+ced+ent+ed
- antecede=ante+ced+e
- antecedent=ante+ced+ent
- antecessor=ante+cess+or
- recede=re+ced+e
- retrocede=retro+ced+e
- recession=re+cess+ion
- retrocession=retro+cess+ion
- intercede=inter+ced+e
- intercession=inter+cess+ion
- intercessor=inter+cess+or
- exceed=ex+ceed
- excess=ex+cess
- excessive=ex+cess+ive
- proceed=pro+ceed
- procedure=pro+ced+ure
- process=pro+cess
- procession=pro+cess+ion
- succession=suc+cess+ion
- successive=suc+cess+ive
- successor=suc+cess+or
