I like the music which can dance

1） which前面可以有介詞，that不行。
the small village in which we spent our childhood has a lot of big changes.
2） 先行詞是all/everything/nothing/something/anything/much/little/few等不定代詞時其后必須用that；作為先行詞的名詞前有序數詞、形容詞最高級以及the only/the very(恰好；正好)/
the just(正好；恰好)等限定語時其后必須用that。
there is nothing that can make him happy again.
that is the first/the best/the only movie (that) i’d like to see.
 從定語從句與先行詞的關系來看，定語從句可分為限制性和非限制性兩種：
1） 限制性定語從句與先行詞關系很緊密，若被去掉主句存在的意義將嚴重受損。
he who doesn’t study hard won’t pass the exam.
march 23, 1990 was the day when jim was born.
2） 非限制性定語從句與先行詞關系不緊密，只是對先行詞作一些補充或附加說明，即使去掉也不太影響主句存在的意義（that不能引導非限制性定語從句）。
the small village, where we spent our childhood, has a lot of big changes.
i gave our new teacher a bunch of flowers, which made her very happy.
miss li, who came to see us yesterday, is our teacher.
3） 限制性定語從句不能用逗號“,”與先行詞隔開，而非限制性定語從句通常用“，”與主句隔開。（例句見上例）
 使用定語從句應注意以下幾點：
1） 關系代詞在定語從句中作主語，其后動詞單復數形式由關系代詞前的名詞或代詞（即先行詞）決定。
he who doesn’t study hard won’t pass the exam.
2） 因為關系代詞或關系副詞在定語從句中已充當一個成分，該從句中不能出現與它重復的成分出現。
that is the only movie (that) i’d like to see. (√)
that is the only movie (that) i’d like to see it. (×)
在該例句中引導詞that作定語從句中see的賓語，不能在see后面再加上一個重復意義的it作賓語。
3） 定語從句中的固定短語不能拆分成介詞＋which/whom引導的結構。
the pen which i’m looking for is blue. (√)
the pen for which i’m looking is blue. (×)
(三)練習
  1. those        not only from books but also through practice will succeed.
     a. learn           b. who            c. that learns          d. who learn
  2. anyone        this opinion may speak out.
     a. that againsts                b. that against       
c. who is against              d. who are against