interesting question. first of all, it is necessary to clarify the nature of these words: -for verbs (動詞), we have use and be example would be 1.e.g. I use my pen to draw a picture. (P.s. you shall search for the difference of use and usage if you want to know more) 2. e.g. I want to be an artist. She has been murdered by the prince. -for preposition (介词), we have of, to and for e.g. The car of John broke down I give my praise to you. The wedding was tailored for you. -and the is singled out as definite article (don't know its Chinese)- you shall search the internet to how to differ the/an/a e.g. The house, the trees, the woman,etc. Sorry that I am not really answering your question:P But if you really want to have a clearer mind of the difference of use , of, be, to, for, the, you can look up for the book called - "the element of style" I am also not a native English speaker and am still working hard to brush up my English. However, from my experience, I think that it is more important to read more books than to familiarize yourself with the rules and grammar. Just like how you learn your first word, you learn about the culture and the tone before you put your hands on the structures and grammar. In the end, I would like to suggest a few books which might help you to have a better idea of English. 1. The Lord of Ring ( yes, i know it is a trilogy and there are many pages but that would not take away the joy of reading. Believe me) 2. The fault in our stars (yes, it is talking about teenagers but the book is AWESOME) 3. Um, haven't thought of anything up to this moment, perhaps you can search "the best book ever" on Google and see what turns up

http://www.englishclub.com/grammar/parts-of-speech_1.htm Perhaps this will help you Miya

They are very different words. Have you used a dictionary? If there are specific ways that you are confusing them, then ask about that.