may be you can use internet, http://www.baidu.com/index.html or http://www.google.cn/ is OK.

玩得开心，玩得尽兴。 for example: You'll sure to have fun at the party tonight. 你在今晚的晚会上一定会玩得很开心。

would like to be.

they are both the mark often using to quote the name of a book,a song,a movie or anyother kind of artworks. but they are different in function. you konw that there are two kinds of forms in writing.in ancient China, people wrote like this: 我wo 爱ai 你ni; but nowadays,we generally write like 我wo爱ai你ni so, to the former, people use 「」,while to the latter,people use << >> .

yes,there are different. 之is pronoun here ,which means 'it';and the latrer 所以 means "the reason is... ("之是代词 ,表示“它”，“ 所以”表示原因。）

in fact i am confused by your question, i am not understand it very clearly. what's your mean "single words"? just as David said:chinese character is made up of basic strokes. such as 一(横)丨(竖)丿(撇)丶(捺or点)乙(折) and so on; or your mean some character pronounced single,like 啊a,哦o, and so on; or what you asked is like some characters like 我wo3, 甲jia, 年nian，and so on(may you can found they are different with characters like 你ni, 他ta，奇qi ....in word structure)?