For和to这两个介词，意义丰富，用法复杂。就它们主要用法进行比较。
表示各种“目的”
1. What do you study English for? 你为什么要学英语？
2. She went to france for holiday. 她到法国度假去了。
3. These books are written for pupils. 这些书是为学生些的。
4. hope for the best, prepare for the worst. 作最好的打算，作最坏的准备。
对于
1．She has a liking for painting. 她爱好绘画 。
2．She had a natural gift for teaching. 她对教学有天赋/
表示赞成同情，用不用
1. Are you for the idea or against it? 你是支持还是反对滚伏纯这个想法？
2. He expresses sympathy for the common people.. 他表现了对普通老百姓的同情。
3. I felt deeply sorry for my friend who was very ill.
表示因为，由于（常有较活译法）
1 Thank you for coming. 谢谢你来。
2. France is famous for its wines. 法国因酒而出名。
当事人对某事的主观看法，对于（某人），对…来说（多和形容词连用）用介词to，不用for..
He said that money was not important to him.
他说钱对他并不重要。
To her it was rather unusual.
对她来说这是相当不寻常的。
They are cruel to animals. 他们对动物很残忍。
和fit, good, bad, useful, suitable 等形容词连用，表示适宜，适合。
Some training will make them fit for the job.
经过一段训练，他们会胜任这项工作的。
Exercises are good for health.
锻炼有益于健康。
Smoking and drinking are bad for health.
抽烟喝酒对健康有害。
You are not suited for the kind of work you are doing.
表示不定式逻辑上的主语大咐，可以用在主语、表语、状语、定语中。
1． It would be best for you to write to him.
2． The simple thing is for him to resign at once.
3． There was nowhere else for me to go.
4． He opened a door and stood aside for her to pass.
表示前往（某地）去某地，用for不用to
I bought a ticket for Milan.
I start for Shanghai tomorrow. 我明天去上海。
The ship is for Liverpool. 这艘船是开往利物浦的。
表示到达的目的地、终点.用to不用for
The bus will take you to the post office. 公共汽车会把你送到邮局去的。
He saw her to the railway station. 他把她送到火厅肢车站。
作为（意思接近as）for可以与to互换。
I’ll keep it for a souvenir. 我将把它留作纪念。
He spoke English so well that I took him for a foreigner.
他英语说的那么好，我还以为他是外国人。
He took her to (or for) wife. 他娶她为妻。
表示交换
1） I bought a bicycle for seven hundred yuan.
我以七百元买了一辆自行车。
2） He is willing to work for nothing.
他愿意义务地工作。
表示就…来说，用for
He was tall for his age. 以他的年龄来说他的个子是很高的。
For so young a man he had read widely. 作为这样年轻的人，他书读的是够多了。
表示相应、对应，一般for 的前后用同一个名词。
Don’t translate word for word. 不要逐词翻译。
Blood for blood ! 血债血偿。
Eye for eye, tooth for tooth. 以眼还眼，以牙还牙。
To 的此种用法表示贴着，对着。
The two lovers dance cheek to cheek.
这对情侣跳贴面舞。
They stood face to face ( back to back )
他们面对面（背对背）地站着。
to 和动词连用，表示“对”，“向”“给”等
Did you mention this to him? 你向他提到这事了吗？
Give my love to your parents. 代我向你父母问好。
I have to apologize to you. 我得向你道歉。
For和to这两个介词，意义丰富，用法复杂。这里仅就它们主要用法进行比较。
一、表示各种“目的”
1.What do you study English for? 你为什么要学英语？
2. She went to france for holiday. 她到法国度假去了。
3. These books are written for pupils. 这些书是为学生些的。
4. hope for the best, prepare for the worst. 作最好的打算，作最坏的准备。
二、对于
1．She has a liking for painting. 她爱好绘画 。
2．She had a natural gift for teaching. 她对教学有天赋
三、 表示赞成同情穗态，用不用
1. Are you for the idea or against it? 你是支持还是反对这个想法？
2. He expresses sympathy for the common people.. 他表现了对普通老百姓的同情。
3. I felt deeply sorry for my friend who was very ill.
四、表示因为，由于（常有较活译法）
1.Thank you for coming. 谢谢你来。
2. France is famous for its wines. 法国因酒而出名。
五、当事人对某事的猜此源主观看法，对于（某人），对…来说（多和形容词连用）用介词to，不用for..
1.He said that money was not important to him. 他说钱对他并不重要。
2.To her it was rather unusual. 对她来说这是相当不寻常的。
3.They are cruel to animals. 他们对动物很残忍。
六、和fit, good, bad, useful, suitable 等形容词连用，表示适宜，适合。
1.Some training will make them fit for the job. 经过一段训练，他们会胜任这项工作的。
2.Exercises are good for health. 锻炼有益于健康。
3.Smoking and drinking are bad for health. 抽烟喝酒对健康有害。
4.You are not suited for the kind of work you are doing.
七、表示不定式逻辑上的主语，可以用在主语、表语、状语、定语中。
1. It would be best for you to write to him.
2.The simple thing is for him to resign at once.
3.There was nowhere else for me to go.
4.He opened a door and stood aside for her to pass.
八、表示前往（某地）去某地，用for不用to
1.I bought a ticket for Milan.
2.I start for Shanghai tomorrow. 我明天去上海。
3.The ship is for Liverpool. 这艘船是开往利物浦的。
九、表示到达的目的地、终点.用to不用for
1.The bus will take you to the post office. 公共汽车会把你扒运送到邮局去的。
2.He saw her to the railway station. 他把她送到火车站。
十、作为（意思接近as）for可以与to互换。
1.I’ll keep it for a souvenir. 我将把它留作纪念。
2.He spoke English so well that I took him for a foreigner. 他英语说的那么好，我还以为他是外国人。
3.He took her to (or for) wife. 他娶她为妻。
十一、表示交换
1.I bought a bicycle for seven hundred yuan. 我以七百元买了一辆自行车。
2.He is willing to work for nothing. 他愿意义务地工作。
十二、表示就…来说，用for
1.He was tall for his age. 以他的年龄来说他的个子是很高的。
2.For so young a man he had read widely. 作为这样年轻的人，他书读的是够多了。
十三、表示相应、对应，一般for 的前后用同一个名词。
1.Don’t translate word for word. 不要逐词翻译。
2.Blood for blood! 血债血偿。
3.Eye for eye, tooth for tooth. 以眼还眼，以牙还牙。 To 的此种用法表示贴着，对着。 4.The two lovers dance cheek to cheek. 这对情侣跳贴面舞。
5.They stood face to face ( back to back ) 他们面对面（背对背）地站着。
十四、to 和动词连用，表示“对”，“向”“给”等
1.Did you mention this to him? 你向他提到这事了吗？
2.Give my love to your parents. 代我向你父母问好。 I have to apologize to you. 我得向你道歉。
to：经常作介词使用，可以译为“到、去”或者没有实际含义，带有发展的趋势的意味。也可以构成动词的不定式(to do)。偶尔也可以做副词，意思是斗档：朝一个方向的; 到某种状态; 关闭等。
for：经常作介词或连词。作介词时，常译为“为(了)...”或“对...而言”也有“因为”的意思。作连词的意思是”因为“。
下面是一些例子：
From 3 to 5. 从三到五。
Tom goes to school. 汤姆去上学。
Pass it to me please. 请把它传给我.
Jerry wants to go to bed. 杰利想上床睡觉。
Tom bought a book for Jerry. 汤姆为杰利买了本书。
It's good for your health.这丛衫对你的健康有益。
It's good for you to do some sports. 做一些运动对你有益。(注意：和上一个句子中的for的用法上稍有区别。上一个句子用的是短语"be good for"，这个句子用的是句型“It's ... for sb. to do sth.”)
If not for John, Brian wouldn't have learned the truth. 要不是因为约翰，布赖恩也不可能知道真相。(这个“因为”是介词)
He had a great desire to have a home of his own for he had always lived with my grandmother. 他强烈渴望拥有一个属于自己的家，因渗销腔为他一直和我祖母住在一起。(这个“因为”是连词)
楼主你好。
for表示为了或者由于的含义，而to表示动作的对象，他们都可以和代词名词或一个相当于名词的词构成介词短语一起做一扒模余个不及物动词的状语！我知道我这样说有些笼统，但是还要自己慢春滚慢去悟！毕竟英语很是灵活，并不是固定的。如码戚：pay attention to都知道是一个所谓的固定搭配，如果给你举个例子，你和你妹妹正在过一条结冰的河，你们的妈妈就对你说pay attention ____your sister.答案是with.再如，你的哥哥学习很好，考试很注意细节，这时你妈妈会说pay more attention like your brother.意思是像你哥哥一样多注意一些！其他的回答者，你以为提问者一个堂堂的高中生会不知道动词不定式的结构？他是在介词上理解不清楚啊！
我英语不好
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