这里要谈的片语动词，是由三个字组成的，方式是：动词+副词性虚词+介词。三字一体的片语动词都是不可分开的，意思比较固定，都要带宾语。
下面便是些常见的例子：
catch up with：赶上
“If a taxi and a bus depart at the same time, the bus is always slower and cannot catch up with the taxi.”
come up with：建议；提出
“Researchers spent a considerable amount of time working on the project, but did not come up with any new idea.”
do away with：去掉、废除
“Are all the traditional things bad and should be done away with?”
run out of：缺乏
“When soldiers run out of provisions in the course of fighting, they are doomed to fail.”
boil down to：总结起来是
“The whole matter boils down to a power struggle between the two cliques.”
break in on：干扰
“The loud noise of the alarm clock broke in on her sweet dream.”
cash in on：谋取利益
“Let's cash in on the fine weather by going somewhere for a holiday.”
catch on to：理解
“An inquiring mind quickly catches on to a new idea.”
chime in with：配合
“The blue shirt chimes in with the colour of his trousers.”
chip away at：破坏
“Over-reliance on teaching aids will chip away at teachers' innovative skills.”
come down with：生病
“Nancy has come down with a bad cold again.”
come in for：获取；继承
“At the death of his father, Lu Ta came in for a large fortune.”
cry out against：大力反对
“The people should cry out against the imposition of unjust law.”
cry out for：非常需要
“Our universities are crying out for capable and experienced teaching staff.”
drive away at：努力工作
“Jason sits at his desk for hours, driving away at his new writing task.”
face up to：敢于面对
“All have to face up to realities.”
feel up to：能担当；能承受
“Being an elderly man, Tony does not feel up to long hours of office chores.”
fill in for：代替
“I can't go to tomorrow's meeting. Can you fill in for me?”
follow up with：探究到底
“After the initial investigation, the police followed up with further scrutiny.”
get off with：回避惩罚
“Because of his young age, the petty thief got off with a warning.”
give in to：妥协；让步
“All and sundry gave in to the orator's convincing argument.”
read up on：熟读
“You have to read up on the previous minutes before going to the next meeting this afternoon.”
zero in on：注意力集中于
“Please zero in on the key issues being discussed.”
