1.base用作动词是“把…建立在,以…为基础”的意思,指人们依据一定的客观规律或自己的亲身体验而得出的一定结论。base常用于非物质结构的基础,这个基础可以是物质的,也可以是非物质的。
2.base是及物动词,常与on连用,作“使建立在…基础上”解。常用于被动结构。

base on〔upon〕(v.+prep.)
使建立在…基础上 build or place; use as a basis for
▲base oneself/sth on〔upon〕 sth
We must base ourselves on the interests of the people.我们一定要从人民的利益出发。
Basing himself on the realities of his life, the painter successfully integrated realism and artistic exaggeration.画家根据自己的现实生活,成功地把现实主义和艺术夸张结合起来。
I base my hopes on the news I had yesterday.我的希望是以我昨天得到的消息为根据的。
We based our conclusion on facts.我们是以事实作为我们结论的依据的。
◇ 用于be ～ed结构
These criticisms are based on misunderstanding.这些评论完全是出于误解。
Direct taxation is usually based upon income.直接税通常是以收入为根据。
This song is based on an old folk tune.这首歌是以一首古老的民间曲调为基础而写成的。
His conclusion is based on practical experience.他的结论建立在实践经验的基础上。

用作及物动词
▲S+～+n./pron.
◇ 用于be ～ed结构
“Where is your company based?”“It is based in Paris.”“你们公司的总部设在哪儿?”“它设在巴黎。”

我的希望建立在这个新计划之上。
［误］  My hope based on the new plan.
［正］  I based my hope on the new plan.
［析］  base为及物动词。因此表示“建立在…之上”或“以…为基础”时不能说base on sth,而只能用base sth on sth 的句型。

［同义词］ n. bottom, foundation, stand, support v. establish, found
［反义词］ n. peak, pinnacle, top
［词源］  ＜拉丁语basis＜希腊语basis(基础)

1.base的基本意思是“底座,基础”,一般指具体有形的事物的底部、基座等; 也可用来比喻理论的基础或讨论的根据等。base还可作“基地”解,多指军事或工业基地。
2.base是可数名词,其前可加a或the,在句中可作主语或宾语。

The Christmas tree must have a base.圣诞树应有个支架。
The lamp has a flat base.这个灯座是平的。
The machine rests on a wide base of steel.机器安装在一个很大的钢制底座上。
When dams are new, they look like heaps of sticks sloping from a broad base to a narrow top.新坝刚筑起时看上去像由底部宽大顶部窄小且又有一定斜度的树枝堆起来的。
It serves the economic base.它为经济服务。
Axioms are the base of geometry.各项公理是几何学的基础。
A base of agreement was arrived at.总算达成了协议的基础。
This innovation was regarded as a sensible base for teaching and research.这一革新被视为教学和研究工作的切实的基础。
The base of his argument is that our price is too high.他的论据是我们的物价太高。
They set up three bases before climbing to the top.在登顶之前他们建了三个基地。
The general ordered his air force to destroy the enemy's naval base.将军命令他的空军部队摧毁敌人的海军基地。
The city will become an important industrial base of our country.这座城市将成为我国一个重要的工业基地。
She travels all over the world but London is her base.她周游世界而伦敦是她居住的地方。

base, basis, foundation
这组词的共同意思是“基础”“根基”。其区别是:base一般指露出地面的、具体有形的事物的底部、基座等，偶尔也可用来比喻理论的基础或讨论的根据等; 还可指军事或工业基地等。basis指无形的、非物质的基础,如基本原则、思想核心、事实根据、行为动机等。例如:
The report has been prepared upon an insufficient basis of facts.写这个报告所依据的事实不足。
foundation通常指有形的建筑物的地下基础,其所表示的“基础”一般比较坚实或更庄严,所支撑的物体要比base的体积大; 也可以表示无形的某种思想或信仰的基础。例如:
The workers are driving in piles to make a firm foundation.工人们在打桩,构筑牢固的地基。

base还可用作形容词,作“卑鄙的”解。例如:
To betray a friend is a base action.出卖朋友是一种可鄙的行为。