KA10107018    兩個子句   

2013/01/14 01:14

要如何判斷，兩個要合併的句子，哪個在前，哪個在後??

E.g.    My mother goes on a diet.
          My mother takes exercise every day.
          用besides合併兩句為一句
         
          答案是
          My mother takes exercise every day besides going on a diet.
          
          可是為什麼不能寫
          My mother goes on a diet besides taking exercise every day.

          謝謝:-)