分类：教育/科学-学习帮助
问题：though和by的区别Yaomingsaidthathecou 
Yaoming said that he could try his best to help the Rocs win more games(through)very hard work.为什么不用by
回答：through翻译成通过，经常后边是effort,hard work等名词
by则是用，表示方式方法，后边加动名词，如working hard,putting in a lot of effort