for
介词核心意思只有四个：为；对于；往；因为
连词核心意思只有一个：因为
为
what can i do for you?
我能为你做什么？
MYSQL: CHECK TABLE checks a table or tables for errors.
我为工作学英语
你能为我翻译这封信吗？
他看美剧就是为了开心
为了美好的未来，她努力工作
I learn English for work
Can you translate the letter for me?
She watches American dramas just for fun
Shw works hard for a great future
对于
that jacket looks big fot you
那件外套对你来说大
这次考试对我来说太难了
这个箱子对我来说太重了
这对我们来说没有
冰激凌对我来说甜
The exam is too hard for me
The box is too heavy for me
It is useless for us
ice cream tastes sweet for me
往，向
They were heading for the train station
他们朝火车站走了
开往北京的火车
我们出发去往美国吧
他明天将前往德国
a train for Beijing
Let us set out for America
He will leave for Germany tomorrow
因为
用于连词时，用于引起的分句对前面的话进行解释，常用逗号把它和前面的分句分开
She got an award for bravery.(介词)
她因为英勇受奖
He must be out for the light is off in the room.(连词)
他准是出去了，因为屋里灯关着
我笑的说不出话来。
纽约因繁华而出名
她很尴尬，因为她迟到了
I couldn’t speak for laughing
New York is hnown for its prosperity
She was embarrassed, for she was late