As they walked in the store,the clerk came to greet them.
came to方向是“来”,此句侧重点是the clerk 朝them“走来”,说话者此时站的位子在“them”这边.
walk to方向是“去”,侧重点是说话者站在动作者的位子说.
如:As the clerk saw them come in the store,he walked to greet them.
As they walked in the store,the clerk came to greet them.
came to方向是“来”,此句侧重点是the clerk 朝them“走来”,说话者此时站的位子在“them”这边.
walk to方向是“去”,侧重点是说话者站在动作者的位子说.
如:As the clerk saw them come in the store,he walked to greet them.