關係代名詞

http://www.tncvs.tn.edu.tw/englishteachingweb/teaching%20online/SentencePattern/RC1.htm


http://www.npc.edu.hk/staff/~ngtungying/english_grammar/lessons/lesson31.htm


http://tw.myblog.yahoo.com/english-baseball/article?mid=274&prev=275&next=272

http://www.hosenglish.com/epaper/epaper98.htm