这是新概念3册的第5课中的最后一段话,原文是:
However, he had at last been allowed to send a fax in which he informed the editor that he had been arrested while counting the 1,084 steps leading to the fifteen-foot wall which surrounded the president's palace.
我的问题是:
1.counting为什么加ing
2.leading为什么加ing
2.surround为什么加ed