用法1:(表目的)为了。如:
They went out for a walk. 他们出去散步了。
What did you do that for? 你干吗这样做?
That's what we're here for. 这正是我们来的目的。
What's she gone for this time? 她这次去干什么去了?
He was waiting for the bus. 他在等公共汽车。
用法2:(表利益)为,为了。如:
What can I do for you? 你想要我什么?
We study hard for our motherland. 我们为祖国努力学习。
Would you please carry this for me? 请你替我提这个东西好吗?
Do more exercise for the good of your health. 为了健康你要多运动。
用法3:(表用途)用于,用来。如:
Knives are used for cutting things. 小刀是用来切东西的。
This knife is for cutting bread. 这把小刀是用于切面包的。
It's a machine for slicing bread. 这是切面包的机器。
The doctor gave her some medicine for her cold. 医生给了她一些感冒药。
用法4:为得到,为拿到,为取得。如:
He went home for his book. 他回家拿书。
He went to his friend for advice. 他去向朋友请教。
She often asked her parents for money. 她经常向父母要钱。
We all hope for success. 我们都盼望成功。
Are you coming in for some tea? 你要不要进来喝点茶?
用法5:给(某人),供(某人)用。如:
That's for you. 这是给你的。
Here is a letter for you. 这是你的信。
Have you room for me there? 你那边能给我腾出点地方吗?
用法6:(表原因、理由)因为,由于。如:
I am sorry for it. 对不起。
Thank you for coming to see me. 谢谢你来看我。
You can't see the wood for the trees. 你只见树木,不见森林。
He is famous for his poems. 他因为他的诗出名。
He was sent to prison for robbery. 他因为抢劫而坐牢。
I couldn't speak for laughing. 我笑得说不出话来。
He couldn't sleep for joy. 他高兴得不能入睡。
For several reasons, I'd rather not meet her. 由于种种原因,我宁愿不见她。
用法7:(表目标、去向)去。如:
Is this bus for Chicago? 这辆公共汽车开往芝加哥吗?
They'll leave for Beijing tomorrow. 明天他们动身去北京。
They set off for the shops. 他们买东西去了。
Is this the train for Shanghai? 这是开往上海的火车吗?
Passengers for Tianjing must change at Beijing. 去天津的旅客必须在北京换车。
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至于你的句子,好想不太正确