文法及寫作Grammar and writing(some links)

Sometimes these words will tell the reader or listener whether we're referring to a specific or general thing (the garage out back; A horse! A horse! My kingdom for a horse!); sometimes they tell how much or how many (lots of trees, several books, a great deal of confusion). The choice of the proper article or determiner to precede a noun or noun phrase is usually not a problem for writers who have grown up speaking English, nor is it a serious problem for non-native writers whose first language is a romance language such as Spanish. For other writers, though, this can be a considerable obstacle on the way to their mastery of English. In fact, some students from eastern European countries — where their native language has either no articles or an altogether different system of choosing articles and determiners — find that these "little words" can create problems long after every other aspect of English has been mastered.




http://grammar.ccc.commnet.edu/grammar/
 http://www.edunet.com/english/grammar/toc.cfm
 http://www2.actden.com/writ_den/t-guide.htm
 http://owl.english.purdue.edu/handouts/esl/eslstudent.html