important; major; significant; momentous; vital; key; essential; weighty; substantial; of moment; of concern
我也经常弄混，不过口语中FOR & TO混用都不算什么致命错误了。。。
1 It is important to me.
2 It is important for me.
比如，一件事情的成败关系到我的将来，那么用第1句，to me,因为如果这件事情成功，它就对我很重要；但如果它失败，那这件事情对我就不重要了 毫无意义了，所以是 to me,比较物理一点；
而 for me 则是感情化一点的～～
1. look what you've done to me. 你看看你把我弄的（物理上的受伤或身体上影响）
2. what you've done is very important for me.
Everybody knows that English is the most widely used international language of today. It is spoken by more than half of the people of the world. Some speak English as their own language, and some speak it as a second language. By learning English we can enlarge our mental horizons and increase our knowledge because we shall have a better chance of reading a wide variety of books, newspapers, and magazines.
English is also useful in other different fields of life such as business and commerce. Indeed, many businessmen build their success upon their good knowledge of English.
Students sometimes study their subjects in English. Businessmen use English at their meetings; scientists and doctors write articles in English; tourists speak English when they go abroad, it helps them enjoy their trips and communicate with other people to develop better understanding and establish new friendships.
Moreover, English helps us follow television programs and enjoy interesting films, and read the literature of other people.
English is particularly important in the fields of science and technology. There are many scientific books that we shall not be able to enjoy without a good knowledge of English. Besides, technology of the modern world is, as a matter of fact, available in English. We would be completely ignorant of many scientific facts without knowledge of English.
From what we have said, one can say that English is learnt for both benefit and enjoyment. It is, in a word, a way to success not only in examinations but also in life, for this reason, students learn English - not only to pass their examinations but also to enjoy the pleasures of life.
We can summarize the reason for wanting to learn English in that nothing can be done, without it. Especially with regards to dealing with computers and modern technology, such as the internet. Without English, one is closed to those linguistic items which render us capable of entering the modern technological world.
Very important person