work in,work at,

通常介词短语会应为场合的不同用发不同
不知道E过人怎么想的
怎么语法错误

work on something 研究某方面的东西
例句：he is work on this project他在研究这个项目
work in 和work at都是在某处工作
例句：he work in/at a factory他在一个工厂工作
work for 为某人或为某事工作
例句：he work for his boss他为他的老板工作
he work for the company他为这家公司工作
work as 作为.而工作
例句：he work as a volunteer in the community 他作为小区的志愿者而工作
纯手打的,

work in 引进,配合
work at 从事,致力于……
work for 为……做事,为……尽力,被……雇佣者
work out 可以解决,设计出,算出,计算出,消耗完
挤出去

work at +地点
work in +地点
一般说 I work in a company
而不说 I work in XXX company
in 只表示地点,而不是为其工作对象
都可以,
如果说给某个公司工作用work for 比较多
如果是给某个项目工作用work on a project

work at +地点
work in +地点
一般说 I work in a company
而不说 I work in XXX company
in 只表示地点,而不是为其工作对象
work on 继续工作,致力于.
work over 检查,充分研究,重做,等

work for 通常指为某人某事或者某单位效力.
work in 通常指在什么地方工作(工作单位的规模较大).
work at 从事某事,或者是致力于某种工作;也可以指在小规模的地方工作.

应该填work on
他们在这项（工作上）花费了上百年的时间

my father is a driver working in Angola
Received your photo,you are so beautiful,smiling amazing

work at(v.+prep.)
▲work at sth
1.在…工作 work at one place
How long have you been working at the bank?你在银行里工作多久了?
2.从事于,致力于 be engaged or employed in
work in with(v.+adv.+prep.)
与…合拍; 与…协调 cooperate with
▲work in with sb/sth
But will he be able to work in with our existing team?可他能够跟我们现有的球队协作吗?
work on1(v.+adv.)
1.继续工作 continue working
▲work on
They'll work on till sunset.他们将继续工作,直到日落.
2.轻轻地安装好 fix on by gentle steady action
▲work sth⇔on
He managed to work the screw on.他设法把螺丝装好了.
work on2〔upon〕(v.+prep.)
▲work on〔upon〕 sb/sth
1.影响; 激起 affect; excite
The medicine the doctor prescribed worked upon his illness.医生开的那种药对他的病有疗效.
2.致力于 be engaged in
He has been working on a new novel for over a year now.近一年多来,他一直在写一部新小说.
3.努力影响,努力说服 strive to influence or persuade
We will work on those who have erred and help them do right.我们将对犯了错误的人做工作,并帮助他们改正.

work in groups