live off . survive on 靠…活下去
He lived off fruit and nuts in the forest．他在森林里靠水果和坚果维持生命。
These animals with long necks live off leaves of tall trees．这些长颈动物吃高树的树叶。
live off . live at the cost of；depend on for support and shelter 靠…供应
He's been living off his brother for nearly a year．近一年来他一直靠他兄弟接济。
live off . find enough food or income寻求足够的食物或收入
She will not be able to live off her writing．靠写作她是难以谋生的。
live on . have…as food or diet；rely on as food 以…为食
They live chiefly on rice．他们以米为主食。
He lives on plain food．他靠粗茶淡饭度日。
live on . depend upon for support，靠…过活
How can he manage to live on that pension? 依靠那点养老金他怎样生活呢?
He lost his job and lived on credit．他失去了工作，靠借贷过日子。
I can't live on air！我总不能靠喝西北风过日子！
Don't live on rumour mongering and lying．不要靠造谣说谎过日子。
live on . continue to live；continue 继续活着；继续存在
He will die，but his fame will live on after him．他是要死的，但是他的声誉将永存。
These traditions will live on for centuries．这些传统将世代相传。
live on one's name . live on one's reputation . keep one's position or continue to earn money because one has been successful in the past 靠过去的名声维持生活（或挣钱）；吃老本
Tom has only written one bestselling book；he can't live on his reputation for ever．汤姆只写了一本畅销书，他不能只靠这本书的名声过一辈子。
live out . stay alive through；survive；last through；endure to the end of 活过（一段时期）；保持寿命；忍受到最后
He lived out the earthquake，but his house was completely destroyed．他虽然经历地震而活过来了，但他的房子彻底完了。
The patient lived out another month．病人又活了一个月。
I doubt if she'll live out the winter．我怀疑她是否能熬过这个冬天。
live out . live outside a place of work or institution在所在单位外寄宿
My servant lives out．我家的佣人不住在我家。
live out . finish（a period of time）； spend 完成（一段时间）；消磨时间
After retiring，John and his wife lived out their lives in Florida．退休后，约翰和他太太在佛罗里达度过余生。
live through . experience and survive 经历…而未死；活过
The old worker who spoke to us yesterday had lived through the three revolutionary civil wars．昨天跟我们讲话的那位老人经历过三次国内革命战争。
I don't think the old man will manage to live through another bad winter．我想这位老人熬不过明年的严冬了。
All those who lived through the earthquake still have fear in their hearts．所有经历过那次地震的人至今仍然心有余悸。
live up to . reach or maintain a certain high standard达到；不辜负（期望）；无愧于
This car will certainly live up to all your expectations if you buy it ，sir．如果你买这辆车的话，先生，它将肯定会使你一切如愿的。
It was clear that he would never live up to his father's expectations．很显然他永远也达不到他父亲对他的期望。
We'll live up to what our Party expects of us．我们决不辜负党对我们的期望。
live up to . act according to；agree with；follow 遵守（原则）；履行（诺言）等
Students should live up to certain standards of behaviour．学生应该遵守一定的行为准则。
It is difficult to live up to the principles of the Christian religion．实行基督教的信条是不容易的。
You must live up to your promises．你必须履行你的诺言。
live with . dwell with 和…住在一起
It's always better to live with someone you respect because respect breeds confidence．最好和你所尊敬的人生活在一起，因为尊敬会产生信任。
She expects to live with her classmates．她想和她同学住在一起。
live with . accept without protest；resign to；put up with 接受；忍受
Whether you like it or not，you will have to live with the new tax law．不管你喜欢与否，你得接受新的税法。
You must live with the fact that you're no longer as young as you were．你必须承认，你已经不象过去那样年轻了。
long for . expect anxiously；greatly desire渴望
People are longing for peace．人们正渴望和平。
It is been raining for days， and we are all longing for some sunshine．一连下了好几天雨，我们渴望太阳出来。
look on . look upon . watch without taking part；be a spectator旁观
I looked on as they tried to fix the machine which had broken down．当他们在修理坏的机器时，我在一旁看着。
The children played in the park while their mother looked on．孩子们在公园里玩，他们的母亲在一旁看着。
look on . look upon . regard；consider；think of认为；看待
I don't know how you look upon this matter．我不知道你怎么看待这件事。
He's always been looked on as one of the best lawyers in town．他一直被认为是城里最好的律师之一。
He is looked upon as a great authority on the tax system．在税收制度方面他被看作是一位大权威。
We should look on the bright side of things．我们应该看到事物光明的一面。
They all looked on him as a member of their family．他们都把他看作是自家人。